Why do the government don't do anything for the malnourished people?

Answer 1

Nowhere is it written that the Federal Government is supposed to care for people. This has traditionally been the duty of states, cities, churches, and so on.

Another Answer: In the United States and in most English Speaking Countries, the government has programs available to prevent malnutrition. The program is there. People must use it. No one will put a gun to their heads and make them use it.

In places like Zimbabwe, foreign governments have been given enough food aid. The local government has prevented the food from getting to the people. Neither the United States nor Europe will send in an Army and force the local governments to accept food aid and feed their local populations.