40 years ago, a relative worked at a candle making factory. The expectation of the workers was to make 6 batches per day. A few weeks before Christmas, the boss asked kindly if he and his coworker would work a harder during the holiday and make 10 batches per day with no extra pay or extra hours. They ran and accomplished the goal for those few weeks. After the new year, the boss asked the two guys why they were only making 6 batches per day, and they responded that they were doing the boss a favor during the busy season. The boss THEN expected 10 batches per day from those guys. Well, as everyone reading probably guesses, that was both of their last day at the candle factory.
Labor exploitation isn't anything new. Don't overwork yourself at a job that doesn't compensate appropriately.