Heh, yes sometimes these meetings come as negative feedback so that neither you or your peers believe that there is any sensible maximum hours to work.
OT is a nice incentive, if you're getting paid any overtime. However, there is a risk of accidents after working many hours. After 8 hours mental focus and muscular motricity deteriorates. As attention wanders there are risks of losing limbs, among other dangers.
I worked for a big consulting firm in the US, back in the '00s, as part of a multinational team, and I can tell Americans are kind of crazy. After working a 70 hour week I got called in on a Saturday at 11pm: they team on site was desperate because they could not find information they needed for a report. The number was right in front of them but since the manager would not let people sleep they could not even see the numbers even if they were pointed out at them.
That was not the only episode: the next weekend the American team decided to take two hotel rooms (one for the girls and one for guys) for a team of 20, and hot-bunk in order to meet a deadline. This was decided regardless that the information available was that the deadline could not be met because of errors in previous year's financial statements of another company. Somehow "hard work" would fix it.
Productivity means working smarter, not working harder. Americans are great at this because of a better educated (on average) workforce and technology available. Somehow this sometimes does not work.
One good 8-hour sleep and stupid decisions are not made.
Think of that Saturday as the day to work on a profitable project or second job. If you do line work you are probably good with your hands. Learn to fix something.
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When I was in corporate I used to have one month paid leave (because laws) and I could take another month off unpaid leave. I saw the inneficiencies in corporate (bureaucracy, procedures, reports that were never read) and designed the work to fit both my lifestyle and the company's bottom line. Nowadays I am independent and I work 8 months a year. There is also a seasonality to the job and I already save enough. I am not going to bust my balls working to sell sand in the desert.
I understand if you can't see it. When I was young I also thought it could be a lie. Mind you, I worked my ass off and studied hours upon hours and eventually learnt. But you have to realize at some point that 60 hour work weeks will only drive you straight from your work and into the coffin.