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Perhaps, but I think you overestimate the number of really unpleasant jobs around. Most of the low paid jobs are simply boring, unfulfilling, menial, etc....snip....
Are they? One large segment is personal care and caring for people is often portrayed as one of our most noble vocations. Where I live being a household cleaner will earn you considerably more than a carer. (Carer £10.42 - £13.50 per hour, domestic cleaner £15-20 per hour.) The carer will have training - albeit not so much and is only responsible for someone's else's quality of life so nowt important.