Although the measure of Gross Domestic Product is very useful, other measures in society can also tip a hand to well being. These life indicators are presented in conjunction with GDP measures in the following graphs.

Now it would be easiest to lead with the money and say the benefits are a result. But one must wonder if a workforce is more untuned to their work when they are not heart broken by the heartbreak of infant deaths. Or if the mothers would have been stronger in child birth with a more educated birthing team.
So yes, money encourages the doctors to stay instead of venturing their skill off in a foreign country. But this is tied to having a well supported education system in the first place. And without people fighting to coordinate the delivery of clean water, wasted time would be spent on hauling and purifying the liquid over an open flame.
The positive correlation between increasing wage collection and desirable social goals like health, safety, infrastructure and education are true. But I think there’s a lot more to be learned about the multiple interactions in play with money being one category along side vitality, a sound diet, a sense of well being, the ability to live with water and sanitation, generalized provision of utilities like fuel and lighting. It’s a matrix solution.
In short, the level of wages reflects how well the public has sustained educational attainment; a healthier workforce is a more productive one; and the price of land registers the higher demand that a well-infrastructured community can draw.