If managers are so good at managing things, how come they can't manage to manage themselves?

When I was in warehousing, it seemed like it was the people to kissed the most ass that ended up in management, not the people that were capable. The quietly competent workers stayed in entry level positions, some of them for decades. And over time, more and more of these positions are created till you have guys that do nothing except drive to different warehouses for 'inspections'. We'd have 3 or 4 different managers come through multiple times a year, rent a convertible to drive across the country, stay in hotels, have all meals paid, to walk into a warehouse for 15 minutes and then leave. Sometimes one would come just weeks after another. We always had to work extra hard to make sure the warehouse is spotless, and they often wouldn't even walk around.

Meanwhile, we might get a pizza once or twice a year, and wages were capped. Ask for a raise? Can't afford it sadly