A 7 day workweek becomes the global standard. How do you cope?

I stop working altogether.
For real. That's what happens. When I am in serious overload, I get kinda blocked and cannot achieve anything anymore.
But also on a global level, I think it would break down most workers quite soon.

Or just don't comply with it ?
I mean no one uses fucking iso8601 and they never get brutally murderd anywhere near often enough.
- Good point, I should start murder more people who don't use iso8601.... It's about time!
- I mean they should be using rfc3339 as it is an open standard unlike the iso.

Call in sick 3 days a week.
- You think they'd be offering sick days?? I think you're bound for the camps if you can't keep up. Oh shit... This is starting to sound familiar...

I've been hearing about a 4 day work week but haven't heard anyone talking about 7 days.
I picture country-wide strikes, even for non-union workers.

I invent the 10 day week.
- With 7 working days, I think we might need a 13 day week.
  
  Bingo!
- Usual workday is 8 hours, you can fit 3 of those in one day. So We can go to 21 days a week!

Try to move out of China.
They literally have 6-7 day work weeks, 10-12 hours a day.
Fucking brutal.

The longest I ever did it was 5 weeks straight working 12 hour nights too. Everyone thought I'd quit, but I ran circles around them.
Everyone basically gets way less productive, especially with any physically strenuous activity. It's like you/your body knows full recovery is not an option. You don't get more done, you're just there when shit hits the fan.
I personally adjusted just fine. It is no different than slavery. All labor is technically wage slavery. I owned my own business before and after that job. Owning your own business is no different. The line between your life and your business is irrelevant when it is your own business, especially if you have employees.

I'm WFH with a pretty chill work day except I'm on standby 24/7 in case of something stupid happens at work. So not much would change for me, honestly.

Bruh a lot of us are out here with two jobs already working nine shifts a week. People are gonna do what they got to do.

Small acts of rebellion. Take extra long breaks. Automate parts of my job and then don't tell anybody that I did it. Break some shit on purpose and act like it was an accident. Steal as much stuff that isn't nailed down as possible. The list would go on, but I'd honestly have no idea what I would actually do in that situation.
I'm certainly not giving it 100% at whatever job I'm working at. I would say form a union, but that's hard to do when you are working for 56 hour workweeks plus commute, not including overtime. That's assuming the 7 day workweek remains 8 hour shifts rather than moving down to something like 6 hour shifts with an unpaid lunch break.

I love what I do, and work+uni combined, I approach the 70h/week of time investment anyways.
Though it only works because I like investing the extra time - I might start hating it, if it becomes the normality.
I fear many people in differing fields would get overworked quickly, the birth-rate would drop, as well as overall GDP.

I basically already have a 168h workweek since I'm always on call.
Edit: no one should have to work this bullshit. I'll do it so you don't have to

I don't do shit for two days a week.
- *three
  They gotta learn that 5 is more efficient that 7, 4 is more efficient than 3

There are currently no laws indicating how many work days should be in the 7 day week.
There is no reason to implement such a thing either to take work days away or add them. Work days are dictated by the employer in accordance with how much work needs to be done.
How much someone should work should be negotiated between employee and employer. I understand that this isn't really how it works in the real world but this is how it is on paper.
I bring this up because there's no real way to institute a nationwide "7 day work week" making this question totally pointless and nonsensical.

Figure out a way to live cheaply, and work for myself. At least if it's 7 days a week I'm doing it for me and maybe I can become successful enough to not have to work those 7 days a week at some point.