Imagine this:
person A has no money and is working 50% of his time to get paycheck, rest of his time he uses to sleep and be with family. 100% time used
person B has money, and can hire other people to do job instead of him , and he gets his own cut, therefore, he earns money without wasting time to do so, allowing him to spread his business more and more, earning more, and with no time wasted on actually doing anything.
there's also a word for this ; modern slavery.
It is not slavery because the first person was able to receive a paycheck in exchange for his work. His paycheck is reflective of his skills that he can offer and the skills needed for his job. What you are likely wanting to see is unskilled people being able to make huge sums of money, however this is simply unrealistic.
The reason why the 2nd person is able to make money off of others' backs is because they are risking their own money to hopefully earn a return on their investment. It is not guaranteed that the 2nd person will end up making money, but it is guaranteed the 1st person will make money as long as there is work available.