They are doing 9-5 and then do whatever they want with their life. Maybe they are working on a side to break from corpo world, maybe they have no other choice or wants.
But to suggest that this is how you "get back at corporate America" is laughable. In fact, it's the opposite.
If you're not getting fired... you're either going to or you're doing as much as expected so everyone is happy.
Don’t get me wrong, shitty managers need checks and balances, but when an org loses so much trust in itself that it makes it impossible to remove pretty much anyone (except those trying to improve things usually, despite the rules), it’s going to get pretty bad soon.
https://www.theguardian.com/money/2022/aug/06/quiet-quitting...
Reminds me of the Office Space "flair" scene: https://www.youtube.com/watch?v=_ChQK8j6so8
But it sounds like you're just a normal corporate worker who does exactly what is stated in your employment contract and no more (and no less) -- but I suppose you should know that there are many people who do much less work than is formally required and get to keep their job.
There is a pain threshold for most managers to fire an employee. They have to spend time and money on recruiting and training a new replacement, so in theory if the cost of you slacking off is lower than the cost of finding a replacement, they might not actually fire you.
Go get 'em kid. :)
I get back by having a life after 5 pm, Never going in to work on a weekend, taking time off to spend it with family and never letting stress and bs from corporate world affect my private life.