not OP

I've had numerous jobs that had 'unwritten rules', such as being in, dressed, and ready to clock in 15 minutes before the shift starts. Being 1 minute late 3 times in a month was grounds for dismissal. It's the old way that everything wanted to work.

If the job market is bad and managers are tyrants, you end up being soft-forced to put in more time.

If you don't do it, you prob won't get fired, but you prob also won't get raises in hopes for attrition.