Kinda like all the hubbub about camo patterns. Lots of hate and envy when we should be talking about what works and is efficient.
If you work in an office environment, you should probably wear blues (as much as I hate them, due to material and cut).
If you work in the field, you should probably wear an infantry type uniform in effective camo (what the ABU should have been but isn't).
If you work in an industrial environment...probably just wear the infantry type stuff, if it works (keeps logistics easier).
If you fly, wear a flight suit...you know, the thing purpose built for the task!
If you do work in multiple environments, pick what works best.
...besides, pilots don't think they're better than everyone else because of the flight suit. They'd still think they're better, even in a leisure suit. ;)