Don't know any hiring fair songs per se, but there are some American tunes about hard work for lousy pay in a job one can't get out of.

There's "Diamond Joe," the one about the cowboy in the middle of nowhere whose boss is a scumbag he always seems to end up owing money to (in some versions the employees gang up and kill him so they can go home).

Two from Alaska are "Cannery Call" and "Workin' on the Slime Line." Pay's good at the cannery IF you work until you drop, then get up next morning and do the same, day in day out until the fish quit flooding in.

And I vaguely remember one called "The Next Market Day," about a girl who gets hired, all right, and goes home with gold in her pocket and an invitation to the next market day for the same. And all she had to do was sit down next to the nice man.