I think it's fine, so long as you don't expect to be paid very much.
The are obviously exceptions where people with in-demand skills can work 9am-5pm contracting, but the average person, doing an average job, with average effort, is going to earn average or below average money.
If you can live on that, then fine, but I think you can't really complain about your wages.
Perhaps people in those situations need to consider quiet quitting to provide themselves the free time to upskill and earn better money?
Companies are hardly going to locate their businesses in the UK if we get a reputation for 'doing the bare minimum to avoid being sacked'. If companies relocate it will then impact government finances and result in cuts to benefits, DLA, PIP, etc. I suspect it will be the quiet quitters that will be the ones squealing when they lose their UC top-ups.
Be careful what you wish for...