You haven't really thought this through. Even under your specific definition, there is debt bondage, human trafficking, quasi-serfdom and unpaid domestic labor. According to the Global Slavery Index, there were over 40 million people, worldwide, in modern slavery (which includes 15 million in forced marriages). 71% of the total are female.
The common thread among all groups is: poverty. And it isn't decreasing.
So, what's the answer? First world incomes and third world incomes should meet in the middle with everybody settling at second world income levels for the good of all humanity? And no one will cheat or take unfair advantage? Good luck setting up Star Fleet without going through the near terminal world war first (and having warp drive to give the adventurous and ambitious something to do)