> If a job was truly an even exchange of value between employer and employee, I would expect to see some people working 7 days a week and making 40% more than m

> If a job was truly an even exchange of value between employer and employee, I would expect to see some people working 7 days a week and making 40% more than me, and some people working 3 day weeks and making 40% less. Why? There are plenty of concentration effects that go against this; e.g. it's better for everyone to work the same hours for communication reasons.