I'm noticing lots of people with both the opinion "I don't think I could work under a boss" and "hierarchies are efficient". But there's a tension between these two.

Efficiency properly understood isn't output per man-hour, it's output per unit unpleasantness. That follows from standard econ definitions of efficiency.

I could work for a boss again if it's someone I admire. 

The bigger problem is that most people are bad bosses and we are promoting the wrong people for the wrong reasons. 

Experts should be able to make major money without having to manage other people.