* Orthodox economic theory says printing money leads to inflation. MMT claims this only happens when government spending competes with the private sector for resources and labor. So in a depression, when there is surplus labor and resources, the government should use these things for useful purposes. Also if a country controls its currency, its debt is meaningless. These countries cannot ever run out of money. They just have to modulate their spending so as not to compete with the private sector for scare resources.

Edit: debt denominated in that countries currency is not a problem.

A more general critic of the gates foundation:
https://www.independent.co.uk/news/world/politics/gates-foundation-accused-dangerously-skewing-aid-priorities-promoting-big-business-a6822036.html