Patricio: Exactly! By making medicines "free" you actually exacerbate the problem of unnecessary treatment that could harm future populations. You may also be interested in a paper showing that increasing the price of ACTs for malaria decreased their unnecessary use (http://www.stanford.edu/~pdupas/cohendupasschaner_act.pdf).
Where we don't agree is that we need central channels of selection, procurement, distribution and prescription. We would welcome clear evidence to the effect that such centralization delivers better care.