It is true there was some elements of entitlement in American slavery, but not entirely. A scientific study of slavery in a book called "Time on the Cross" states that slaves were compensated about 90%--the compensation coming in the form of food, clothing, shelter, medical care (till death), as well as many other things. Compare that to the slaves of today: the American middle class. They must work for their own food, clothing and shelter and then pay for others, whom we may define as those using the force of Government as their proxy slave master.
Q: how do today's welfare "masters" compensate their slaves?
A: the politicians who proxy for them: with votes. The actual slave labor in the middle class: not at all.