That aside, plenty of places offer a 4x10, or are fine with it when asked, and I think that's a more productive way to put in 40 hours each week while also being more convenient for yourself (before even getting into wanting to lower total hours).
You end up trying to cheat meals for speed eating unhealthy. High amounts of caffeine, little family time, and at least the first day off is usually wasted catching up on lost sleep. If you happen to do shift work, good luck trying to get much done as you need to shift to a different schedule to be somewhere during open hours.
We were more inefficient going from 5x8 to 4x10. Try training on little sleep before coffee kicks in. You need to re-do it later. Try sleeping after drinking coffee all day to stay awake, it’s great for your heart and blood pressure.
A 4x10 is particularly attractive for those able to work remote and/or without lots of other time commitments. If you have an hour commute each way, kids to drop off/pick up from school/sports, responsibility for cooking meals 100% of the time, and so on then it really doesn't make sense to point the finger at the 2 extra hours as the sole root cause of the problem in that situation.
That said, I recently opted for a 40 hour work week for the first time in decades because otherwise this job is too big a step back in income.
Under that problem statement, it makes a lot of sense for a large subset of healthcare (i.e. the routine or semi routine stuff like emergency services, family doctor routine visits, many common diseases, especially childhood diseases, routine dental, drugs for these diseases, etc) to be single payer (i.e the government) as long as the government is very proactive and flexible in crushing those costs through its multiple available levers.
I see more of a role for private insurance for the rarer stuff where the cost/benefit to society of society paying isn't as obvious and the optional stuff (ie treatments that have a generic option and a newer drug that is more effective, cover the generic, let people buy insurance if they think they want access to the expensive latest and greatest). There is pretty clearly a role for private and public providers of healthcare in both the government single payer and the private insurance role as well.
These are two completely different situations, and the first is absolutely a problem. It means you lose your health insurance if you get fired, and indeed that working part-time may not be feasible.
The efficiency of the system is a separate issue (but also definitely an issue).
Losing your nationality is extremely rare. The two cases couldn't be more different.
I should add that's it's a start-up so some weeks I work more and others less. But I still have the day my kids that I wanted.
Perhaps try quietly asking your current company? They might surprise you and start a trend.
The problem is in knowledge work fields where manpower isn’t scalable (read the Mythical Man Month), and the industries are competitive and winner-take-all. A programmer who works 30 hours a week is far less valuable than than one that works 50 hours a week.