Seen some good manager jobs, seen some crap ones.
My (now-late) cousin had a decent one as a government contractor for the longest time. He puled in a little over $35 an hour doing quality control on transmissions for military trucks.
Then my old manager at JiffyLube was salaried at 48 hours per week and it broke down to about $10 per hour.
Then my old managers at Walmart, the hourly manager was only making $10 an hour and I watched them force him to take a 3 hour break once because they didn't want him to get overtime but still wanted him there for the start and end of the shift.
Then we had the hourly Walmart managers who averages $15 an hour or less while being salaried on a 48 hour paycheck while actually being forced to work a minimum of 52 hours per week because they were not allowed to leave on time EVER.