well, there will always be a divergence (no two people have the exact same needs or wants) but i would argue being co-owner with others helps as a forcing function to help converge interests (you wouldn't be happy with a co-worker slacking off since they're also wasting your money/time not just 'the companys')

and there are many successful co-ops where people have different responsibilities, hours and pay, i don't think that is a requirement for co-ownership (though the variance is definitely less than traditional top-down orgs thats for sure)