I try to pay well, but it's tough because different countries have different cost of life/income expectations. If I pay $8/hr in the US, I am an asshole and it'

I try to pay well, but it's tough because different countries have different cost of life/income expectations. If I pay $8/hr in the US, I am an asshole and it's illegal in many states. If I pay the same in many countries, am I a generous hero? Shall I differentiate by country? But why, it is the same work! Should I pay $15/hr all over the world? Is it fair to pay those lucky ones an extra $5-7/hr for no particular reason, or to give that $5 to their respective country via taxes that all can share (healthcare, education, retirement)? Or should I increase my profits, and give it back to the US people through more taxes? And when AI can do their job, then what? I keep them busy for no reason? Who makes the extra money, only me?