Back-breaking work on the farm. Mind-numbing and body-destroying assembly line work that could cut off your hand. Construction work without any of the safety standards we now have. Alcohol consumption and tobacco smoking was sky-high.
Any way you slice it, the quality of jobs today is tremendously higher than in the past, and people are not being paid less.
True, job tenure is no longer as long-term as it used to be, and probably doesn't come with a pension, but the flip side is that it's also never been easier to find a job and leave a bad one, and you can manage your own 401(k) that won't disappear if your employer goes bankrupt.