I posit there is another category: people who don't accept or can't deal with being idle, but are not careerists and so instead of following your advice or resting-vesting, they find ways to spend their time helping solve actual problems in the company.
My theory is that these people keep many companies afloat, because they go proactively solve the problems the resters are not solving because work, and the job-optimizers won't touch because not promotion-track.
