The US has the most slaves of any country.
Millions of people who have done no harm to anyone but themselves were captured, forced to sign away their lives and then work making The US military uniforms.

Saying that a sweat shop is slavery is only in comparison to economically mature nations. In the poor countries you can make pennies working in the field under the hot sun, or you can work indoor (with no AC) for four times that amount.

There are no other choices available.

How do you get a country to rise out of poverty? You teach its citizens how to make and use things like pumps and pipes. Which is 10x harder than just shipping them the pipe and installing it for them.