I think it's a little unfair - you will always have jobs that are important in the immediate, short, medium, long terms. Society can function perfectly fine without teachers, engineers, scientists... For a bit. Some teams can function fine with reduced manning, but long term need full or more manning, for training, taking care of admin, ensuring sanity, and doing more than the bare minimum.

Not that I disagree that some jobs are for expensive seat warmers to ensure warm fuzzies