Why is there so much pressure and requirement for the USA to take care of the people of other countries?

Where is the pressure and expectation that other world leaders take care of their own?

Where is the pressure for them to do better? Where is the humiliation of other countries for how shitty they take care of their people?

Why do world leaders have exactly 0 pride in caring for their people? Why do world leaders have exactly 0 pride in the prosperity of their own countries?