Where can I find a job that doesn't expect one person do the work of 2-3?

Every job I've had has been severely understaffed. Several positions are vacant, their duties given to other employees on top of their existing duties.

I worked a retail job for a bit and had to quit because I was somehow expected to lift boxes that clearly say that they take two people to lift on my own.

Now I'm jobless and looking for something that

A) Pays a livable wae
B) Isn't understaffed

I refuse to work any job that doesn't fit those criteria.