Every employer thinks only that slavery is the debt burden they bear. Need money to buy slaves, that is, food. The slaves worked hard to repay money they lose is justice for slavery.
All employers think slavery is just that they have to bear the burden of debt. Need to buy a slave to the feeding. The use of slave labor in return for their money lost is justice for slavery.
All employers think that slavery is their debt burden to bear. Have to spend money to buy slaves in feeding. The use of slaves worked hard to repay the money they lost is justice for the slave