Mkemse: NOTHING in return is necessary. At least, not until the people living in the recipient state have risen out of poverty.
... To give, and not to count the cost,
Save that of knowing that we do Thy will.
And who in USA is starving, living in poverty, oppressed by their government, and suffering from lethal disease? Greatest need first!
To say charity begins at home is the most cynical cop-out there is.