I'm actually proud of what I do, it amuses me that no doubt some of the workers in some of the various offices I clean will look down on me as just a 'menial' worker but for the most part, my income will far exceed their own

I have customers in high flying jobs who I would consider clueless and inept, ditto some friends who are in positions of some importance, but again, in so many areas they just don't have a clue.
I'm also the groundsman for my cricket club, too long a story to relate here, but some of my fellow committee members had to chip in and help with the groundwork...
One - a headmaster - was cutting the strip for the following weekends game...he couldn't understand why it wasn't cutting any grass....sigh! I lowered the blades for him.

Prior to that I had to show them how to operate the mower...pull handle to start it...grip lever to make it go...complete doughnuts !
And we are talking headmasters, company directors and the like.
And on the outfield gang mowers, all powered off the PTO on a small tractor...well, that was just too complicated to risk letting one of them use it.
I can strip a car down and rebuild it, (not a modern day BMW mind!) I'm skilled in many area's of the building industry, I am vastly practical...I look down on these headmasters and company directors....they aren't in my class!!!!

lol.
I played Squash (to just under county level) for 20 years, as I played to a good standard I would often thrash others in open club competitions, ergo I was very much respected because of my ability on court.
Squash was a game that attracted people from all walks of life, yo uwould go on court and play your game, shower, change and go for a drink with the guy you'd just played.
Nobody had a clue what the other did for a living, by the time you had got around to discussing what was done for a living, respect had been borne on the squash court.
With some of course, when it came around to telling them you were a window cleaner you could see the double blink of surprise, but the respect remained, especially as in some cases I was also the coach they came too for lessons!
Your own self perception is the most important thing, especially when you find yourself comparing yourself to someone else....you can end out like Ronnie Corbett in the 'I know my place' Sketch (alongside John Cleese - bowler hatted toff - and Ronnie Barker - middle class man - very clever sketch actually...
Ian