I once did a few weeks of 85+ hours when I was in Hong Kong, then was called in to see the manager and was told I wasn't working hard enough. The following I took four weeks' holiday, came back to the UK and never went back.
I've no objection to doing hard work and long hours, but if you then have the audacity to complain I'm slacking off, especially if you're shooting off home at 5pm on the dot, then I'm walking.
JGH