The purpose of the UN's plan (along with Sachs and Millennium Promise) does not run counter to a free trading market. In fact it is aimed to help people reach a minimum level whereby which then can then productivity engage in a free market. A base level of health (via combating malaria, HIV, TB, etc.), a base level of food security (via introduction of natural fertilizers) and a base level of education.
Easterly's analogy of rising per capita income's in West Virginia is valid, except that he fails to concede that a strong determininant of that rise in per capita income also comes from non-market interventions from local, state and federal goverment providing education, health care (for the poor and elderly) and labor/agriculture extension.
The point of the "Sachs Plan" is to provide those basic building blocks to help developing country citizens help themselves in the free market. A point which Easterly glosses over and does not address in his criticisms.