I'd agree that not everyone contributes the same value per hour. And as with any arrangement where you have self-reporting meeting monetary reward it will be ne

I'd agree that not everyone contributes the same value per hour. And as with any arrangement where you have self-reporting meeting monetary reward it will be necessary to have checks against bad actors. But those are problems that you deal with in any sort of business, and it's an agreement among peers, so the social pressure to be honest about both the value and quality of work contributed is going to be quite high.