I'd say companies have zero incentive to spend money on a job that is doesn't need to be done.

So I'd say if there is company X will to spend $Y on a job, then by definition it's not a bullshit job.

Companies, sure. But companies don't spend money - people working at them do. And people working there can have incentives that don't align with the companies incentives.

Not sure what company you worked for, but I can't spend money unless it's approved by the company.

There's a kind of Prisoner's Dilemma here. Sure, set up your company that doesn't have corporate lawyers. It'll work for a while until it very suddenly doesn't. The only way to break out of this is better regulation across industries, but governments also don't always have the right incentives either.