Both have in common the order-giver and order-obeyer.

Of course, I agree wage slavery is better than chattel slavery. Better to have some choice of master than one imposed on you. (Though slaveowners made the interesting argument that they must take care of their workers because they own them, unlike the capitalist who merely rents them.)

In the US, the prison system replaced slavery as the mechanism to control the black population. So the US has not improved much in that regard, with even children killed in broad daylight by the state.