I'll preface this by saying I expect to get downvoted all to hell, but: if these jobs are so bad and so underpaid, why are people doing them in a period of what is reported to be incredible labor market tightness?
I believe none of them require proof of employment eligibility e.g. immigration papers so it's a way for those on the fringes of society to make a living. It's basically the same as why people work bad jobs for cash that is less than minimum wage. There are several layers of illegality here but nobody dares speak up.
In either case, it's interesting though, right? I may be coming across as the free market zealot here, but I don't really understand why special pleading for a class of workers is the right solution here.
If labor conditions are not as good as they're advertised, then isn't the expected outcome here that more people will try to find delivery jobs, resulting in more workers chasing fewer deliveries (assuming prices go up)?