Random anecdote. Slavery means NO days off. If you are sick, you have to get up at 5:30am and go wait in line outside in the freezing snow for sick call (you also have to do this for 'pill line' if you have any meds, though you aren't charged the $5 a pop for that). Sick call costs $5 a visit. You make $5 a month. Then the doctor says 'drink water and take an aspirin' and clears you to go to work. Aspirin is only available from the commissary in large overprices bottles about to expire. You are REQUIRED to throw the bottle away when it is expired or you will get a shot for 'contraband'. You can not share aspirin with others. Hopefully you planned ahead and saved your $5 for 2 months to afford a bottle of aspirin in case you got sick, and it hasn't expired before you get sick. When you get to work, sick, no exception is made for your physical condition. If you work HVAC you're still climbing ladders in the snow to the roof.
Slavery means I was forced to shovel the compound with a shovel with a broken handle so exposed fiberglass that cut me up. I was issued a 'navy uniform' which is what we wear in the feds. So short sleeve shirt, thin khaki slacks, thin socks. And you get a light non-waterproof jacket. You want long underwear? Commissary purchase (4X monthly pay, $20 pants OR $20 shirt). Gloves? Commissary purchase (2 months pay $10). Hat? commissary purchase (1 months pay $5). So I shoveled snow for hours, soaked to the bone, in whiteout conditions, no hat, no gloves, with my hands bleeding. That is slavery. And I had it good. I was able to get the shovel fixed through connections, boy was the cop that made me do that pissed when next time I pulled the shovel out of the locked tool closet and somehow it was fixed even though he kept 'forgetting' to put in a work order.