Worker co-ops don't eliminate executive roles, though. They just make it so that executives serve at the pleasure of the members (and are usually elected in some form). Mondragon has a President, who was formerly a Vice President and Managing Director. REI, a US-based co-op, has a more complicated story: https://en.wikipedia.org/wiki/Recreational_Equipment,_Inc.#G...

They still have hierarchy and pay still scales with position in that hierarchy. The ratio of CEO pay to worker pay is generally more equitable, but it is still a ratio. I have no idea what the work-life balance is like, but running a co-op (or a nonprofit, for that matter) still sounds like a stressful job to me.