Are there any noncompetitive jobs at all anywhere nowadays?

[robert_columbia]

Inspired by this thread, are there any jobs anywhere nowadays that are substantially noncompetitive? That is, getting the job is pretty much a matter of showing up and showing that you can physically do the job, and you can't lose it unless you royally mess up by raping your supervisor and getting into a gunfight with the head of accounting.

I'm guessing that if any exist, they are likely to be piecework and/or commission based, as they can pay lower-performing workers less, and also jobs that scale well (i.e. if the company has 20 employees now, they can just start adding employees and those employees will have productive things to do.)