The people who are likely to drop out of their job are plumbers, dishwashers, garbage collectors, miners, mail carriers, highway maintainers, taxi drivers, manual fruit pickers and the rest of those performing soul-crushing jobs that actually allow society to keep running.
Same thing for any other currently low value jobs. We will have to adjust to paying people properly, even above minimum wage, to do things that suck. I view this as a desirable outcome when considered against the current situation in which only the most glamorous jobs tend to pay well, even if the job is not necessarily most helpful.
If your workers are willing and able to do twice as much work in the same time for twice as much pay, you should likely make that switch anyway - at the least it'd save you bookkeeping, and it would be a better use of the workers' time.
And if people systematically decide that they have better things to do than a particular job, and we automate that job so we don't need people doing it, that seems like a win to me.
Whether it means less people working overall depends on how big these effects are, what the effects are on demand, and whether we couple it with other changes like a decreased minimum wage (which could lead to more people working on things which are more pleasant/fulfilling but less highly paid).