How do we shift the assumption?
From: They stay late at work all the time, they must be getting so much more done
To: They stay late at work all the time, they must not be very efficient/poor with time management.
By questioning it every time it comes up.
"It's 7pm over there! You're still there? My god, what went wrong?"
"It's 6pm. I didn't know you had flexi-time, did you start at 11am or something?"
"Everyone here is working late. Did half the team get fired?"
Just be innocent. Ask innocent questions as though you didn't know people thought this was normal. You keep doing that and eventually people start asking themselves those questions, too.
Remember, about 40% of jobs are
bullshit jobs, and even in productive jobs, the average person is only actually working for
less than three hours a day. They're also searching for other jobs for almost half an hour a day, I suppose they feel overworked.
So if only 60% of jobs are real productive jobs, and if the people doing them are only actually working on their job 38% of the time, then that means that the entire productive work of our society is done with 23% of the work hours paid for. So we're doing unpaid overtime because...?
Cut out the bullshit jobs and the faffing about and we could have a one-day work week.
You'll never effect change in a large organisation. Start your own business. Small businesses are much more efficient, if you employ only 3 people you've no room for box-tickers and goons and flunkies, and there are never any meetings because you talk to each-other all day.