695 million people life with less than 1,90 Dollar per day.
Why not use theire brains? Theire combined brain power could solve alot of problems in this world.
For 60 dollars per month you could buy theire brain,
If you pay them for ten years = 7200$
Why not build schools and pay them?
It costs almost nothing, after that i am sure they would be happy to work for you..