These points are solved by the workers electing an executive or directors who makes those decisions, until the workers are sick of them and replace them in an AGM or an emergency meeting.
Works the same as shareholders.
Works the same as shareholders.
Good co-ops that last have the decisions made by those working there.
And it's a lot of work.
I mean, even regular businesses in practice end up this way - nominally with lots of shareholders, practically run by (and for) a few powerful individuals. That's why we have a concept of "activist shareholder" - in theory all of them should be "active" but in practice almost no one is, so the few who do are labelled (and often "bought" one way or another).