Isn't the pay about the same as the elder career jobs taken over a whole week?
Haha, you wish. $15/hr amounts to a daily take of a whopping $120, for an 8 hour job. TeenElder careers pay out that much in *3* hours. The other issue is that playable employees have this obnoxious habit of, you know, eventually getting old and DYING, which forces you to revisit the business and replace them with a new employee if you want your business to continue functioning when visited as before.
If you never plan to go back, of course, it doesn't matter if everyone dies: Even a dead manager can apparently allow you to check in, at least until you revisit that lot and the game realizes he's dead, thanks to the joys of cached results.