I actually saw a documentary recently about minimum wage jobs specifically focusing on the fact that many are actually very stressful in a specific way, and often people who think of themselves as "above" such jobs, working in higher paid office, clerical managerial or professional roles could not cope with them.
A very banal example was employees who work for an international pizza chain in a very busy location whose sole job is behind the scenes fulfilling take away orders. Each pizza had to be exactly identical to every other pizza of its sort. The size, shape, toping distribution etc had to be exact. The employees had to work very fast indeed, standing up the entire shift. They knew they were disposable, mistakes cost money - time was so tight anything not meeting quality control was binned.
The money involved in a mistake might only have been a few pounds, but nevertheless a few mistakes on probation and they'd be fired.
That's just as stressful as one mistake costing the company millions in its way, especially if you're living pay check to pay check and have people relying on you.
High status, highly paid jobs are not necessarily more stressful than very low status jobs - if you are afraid of making mistakes for whatever reason you'll be stressed.
Obviously there is also "good" stress which gives you and adrenaline rush and keeps you going and "bad" stress which makes you feel fear, misery and eventually makes you unwell if it goes on constantly.