>>11373596
You say that, but that's not necessarily the case.
Remember, slave terms are not definite.
Most permanent slaves started off as indentures. Indentures can gain time added to their contracts by costing their master money in any meaningful way or by violating any terms of the contract (for example, successfully masturbating to orgasm adds a year).
In fact, contracts usually have extremely strict rules. It's estimated that the average indenture lasts more than 50% as long as the original contract term.
Oftentimes, a permanent slave started off as an indenture and her contract simply grew until it exceeded the threshold. Being a slave is sort of like being in a debtor's prison - the slave is being punished for irresponsibility. Slaves are very cheap because they are considered insolvent on their contracts, and are often worked brutally hard. Indentures are typically expected to work 12 hour days 6 days a week, but slaves usually work 18 hours a day 7 days a week. No laws protect their comfort.