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Can we afford to live longer?

We're living longer than ever, but few of us will save enough to afford this historical boon.

  • A person reaching 65 today can expect to live into their mid-80s, many into their 90s.
  • A 30-year retirement requires a nest egg of more than $1 million, yet 77 percent of American households fall short of such savings and investments.
  • Experts recommend several strategies for affording a longer life, such as pushing the retirement age back to at least 70.


If you are reading this, you are one of humanity's lucky few. You and your cohorts will live longer than any previous generation. Ever.

Estimates of pre-modern peoples put the average life expectancy at roughly 30. That's for all peoples the world over. That average began to rise steadily by the Age of the Enlightenment, and since 1900, the global average has soared to more than 70 years.

Today, the country with the lowest life expectancy, the Central African Republic, has nearly doubled pre-modern standards. Meanwhile, developed countries such as Japan, Spain, and Canada have pushed their averages into the 80s.

On its own, this is an incredible achievement for humanity, and science and technology may continue this uplifting trend to help us live even longer. In an interview with Big Think, Dave Asprey, founder of Bulletproof, said he believes he'll live to at least a 180 years old. (Just look both ways when crossing the street, Mr. Asprey.)

But Mr. Asprey is an independently wealthy entrepreneur, who claims to have spent north of a $1 million biohacking his health. Can the rest of us afford to be so enduring?

Retirement: an idea whose time has come

President Franklin D. Roosevelt signs the Social Security Act into law.

Photo credit: Library of Congress/Wikimedia Commons)

Retirement is a modern idea. To our ancestors, the thought that you could spend your twilight years enjoying hobbies, travel, and Country Kitchen buffets was untenable. Unless you belonged to society's upper echelon, you worked, you grew sick, and then you died with precious few moments of leisure between.

There were a few exceptions, such as pensions for soldiers, but it wasn't until the late 19th century that change began on a large scale.

In 1889, German Chancellor Otto von Bismarck introduced modern pensions. American Express offered the U.S.'s first employer-provided retirement plan, and the Baltimore and Ohio Railroad created the first joint-contribution plan. President Franklin D. Roosevelt signed the Social Security Act in 1935, and a provision in the 1978 Revenue Act gave birth to the 401(k).

The problem is that our mentality surrounding retirement planning hasn't kept pace with our hard-won longevity. It remains based on calculations and assumptions we formed when people died younger. Retirements newly protracted costs mean many of us may not be able to pay. At least not comfortably.

The higher costs of longer living

According to the U.S. Social Security Administration (SSA), an American man reaching 65 today can expect to live until he is 84, women until 86.5. But the SSA points out that these are averages. One out of every three 65-year-olds will live past 90, while one in seven will surpass 95.

So, Americans who retire on their 67th birthdays, maintain their health, and remember to look both ways when crossing the street have decent odds to live about a third of their lives in retirement. Again, our ancestors couldn't even imagine such recompense.

Dan Yu, the managing principal at Hillcrest Wealth Advisors, told AARP that many factors go into determining an acceptable nest egg, such as health, where you live, and your desired retirement lifestyle. However, conventional wisdom is to save 10 to 12 times your current income.

Here's one scenario: a household would need roughly $1.5 million to support a 30-year retirement at $50,000 a year. That's assuming interest rates stay relatively steady and inflation doesn't balloon.

"Folks are living a lot longer," Yu said in the interview, "and that makes retirement planning more challenging than ever."

But mercurial interest rates and bloating inflation aren't a retiree's only concerns. High administrative and management fees devour 401(k) earnings. Most of the benefits flow to the top fifth of earners, leaving households in the bottom half to salvage for the 4 percent of scraps that fall their way.

And some lack even scraps. According to a 2018 report by the National Institute on Retirement Security (NIRS), more than 100 million working-age Americans don't own any retirement account assets and the median retirement account balance for all working Americans is zero. If we include Americans who do have saving assets, a staggering 77 percent fall short of "conservative" saving targets. (Though, some commentators believe the NIRS's saving targets are more excessive than moderate.)

Preparing for your (hopefully) long life

None of this is to say we can't afford retirement or that we need to return to an era where working life immediately precedes the grave. But we will have to begin rethinking how we approach and enjoy retirement.

Be prepared to retire later. People working today should plan to shift their retirement past their 60s and into their 70s. The longer you work, the more money you can earn without dipping into your retirement assets. A report from the Stanford Center on Longevity and the Society of Actuaries analyzed different income plans. It found that a couple who waited until 70 to retire would earn nearly twice the annual income than if they completely retired at 62.

"Most older workers will fall short of commonly recommended retirement income targets, unless they can work in some manner into their late 60s or 70s," the researchers write. "Otherwise, they might need to learn how to live on reduced spendable income compared to their working years."

Begin saving now. If inflation is the eternal enemy of retirees, then compound interest is their patron saint. If someone invests $5,000 dollars a year between the ages of 25 and 35 and then stops, their $50,000 investment will equal roughly $600,000 by age 65 (assuming a 7 percent annual return). If someone else invests the same amount annually between 35 and 65, their $150,000 investment will amount to $550,000.

The earlier one starts investing, the greater their accumulated total will be. (The above example is from JP Morgan Asset Management; you can find a handy graph illustrating the difference here.)

Plan for more life than you think. Dan Yu advises saving 100 percent of preretirement income for at least the first 10 years. While some may recommend 70–80 percent, Yu points out that spending doesn't slow down in early retirement as people tend to enjoy niceties such as travel.

Live a healthy life. Health care starts long before you reach the hospital, and that's especially true for your golden years. Staying healthy reduces your risk of expensive illnesses, such as coronary heart disease, and injuries, such as fractured bones from falls. And the longer you can live independently, the less money you'll need to pay out for assisted-living care.

True, healthy people who live into their 90s will, in the long run, pay more in medical expenses than sick people who die in their 70s. But as the adage goes, you get what you pay for.

Consider an HSA. Speaking of health, a health saving account (HSA) allows you to set aside pre-tax money to pay for qualify medical expenses later. These funds can be used to pay for deductibles, copayments, coinsurance, and other expenses. Funds roll over year after year, and you may earn interest.

"Most financial advisers stand to make nothing on an HAS," Jeff Vollmer, managing partner at Hyde Park Wealth Management, told Time, "so it's generally not something that goes into their financial-plan recommendations."

Keep up-to-date on technology. Your retirement savings will take a major hit if you can no longer live independently. But big tech's move into health care may provide ways to assist retirees in living more independent and more comfortably for longer. Telemedicine, for example, could help retirees by offering remote-patient monitoring tools and allowing them to communicate with medical practitioners more easily.

It may go without saying, but let's say it anyway: These are just a few things to consider when planning your retirement, not a roadmap to affording the retirement of your dreams. To determine what approach works best for you, do your research and seek the advice of a financial advisor whom you trust.

We all won't live to be 90, let alone 180. But if we plan properly, we can at least enjoy this gift — this longevity boon — of the modern age.

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The multifaceted cerebellum is large — it's just tightly folded.

Image source: Sereno, et al
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A neural crêpe

A new imaging study led by psychology professor and cognitive neuroscientist Martin Sereno of the SDSU MRI Imaging Center reveals that the cerebellum is actually an intricately folded organ that has a surface area equal in size to 78 percent of the cerebral cortex. Sereno, a pioneer in MRI brain imaging, collaborated with other experts from the U.K., Canada, and the Netherlands.

So what does it look like? Unfolded, the cerebellum is reminiscent of a crêpe, according to Sereno, about four inches wide and three feet long.

The team didn't physically unfold a cerebellum in their research. Instead, they worked with brain scans from a 9.4 Tesla MRI machine, and virtually unfolded and mapped the organ. Custom software was developed for the project, based on the open-source FreeSurfer app developed by Sereno and others. Their model allowed the scientists to unpack the virtual cerebellum down to each individual fold, or "folia."

Study's cross-sections of a folded cerebellum

Image source: Sereno, et al.

A complicated map

Sereno tells SDSU NewsCenter that "Until now we only had crude models of what it looked like. We now have a complete map or surface representation of the cerebellum, much like cities, counties, and states."

That map is a bit surprising, too, in that regions associated with different functions are scattered across the organ in peculiar ways, unlike the cortex where it's all pretty orderly. "You get a little chunk of the lip, next to a chunk of the shoulder or face, like jumbled puzzle pieces," says Sereno. This may have to do with the fact that when the cerebellum is folded, its elements line up differently than they do when the organ is unfolded.

It seems the folded structure of the cerebellum is a configuration that facilitates access to information coming from places all over the body. Sereno says, "Now that we have the first high resolution base map of the human cerebellum, there are many possibilities for researchers to start filling in what is certain to be a complex quilt of inputs, from many different parts of the cerebral cortex in more detail than ever before."

This makes sense if the cerebellum is involved in highly complex, advanced cognitive functions, such as handling language or performing abstract reasoning as scientists suspect. "When you think of the cognition required to write a scientific paper or explain a concept," says Sereno, "you have to pull in information from many different sources. And that's just how the cerebellum is set up."

Bigger and bigger

The study also suggests that the large size of their virtual human cerebellum is likely to be related to the sheer number of tasks with which the organ is involved in the complex human brain. The macaque cerebellum that the team analyzed, for example, amounts to just 30 percent the size of the animal's cortex.

"The fact that [the cerebellum] has such a large surface area speaks to the evolution of distinctively human behaviors and cognition," says Sereno. "It has expanded so much that the folding patterns are very complex."

As the study says, "Rather than coordinating sensory signals to execute expert physical movements, parts of the cerebellum may have been extended in humans to help coordinate fictive 'conceptual movements,' such as rapidly mentally rearranging a movement plan — or, in the fullness of time, perhaps even a mathematical equation."

Sereno concludes, "The 'little brain' is quite the jack of all trades. Mapping the cerebellum will be an interesting new frontier for the next decade."

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