It would be interesting to compare how much we pay for car mechanics per hour compared to aircraft engineers.
I suspect that we don't get bad value from the aircraft side of things, although I have found both to be pretty useless much of the time.
last time i had my car done it was well over £50 per hour!
I suspect that if aircraft maintenance organistions were as busy as your average garage they wouldn't take 6-8 hours to do an oil/filter change and tyre kick which is basically all a 50hr check is. since for most places the volume of work is not there there is no pressure to really crack on.