Fuck this.
In the United States the benefits of full time employment are mandatory if you want to live a much less stressful life. Tying benefits to employment has given employers far too much control over their employees lives, without a huge savings or secondary income source anyone without insurance is one bad day away from bankruptcy (and too many people /with/ benefits are as well).
If a 4 day work week lowers stress and increases productivity that much, I don't see why many industries shouldn't adopt it. And don't tell people that "You have a choice, just get a part time job instead". Thats not a choice, thats a financial death sentence.
If you want to change that start with changing how you vote, the two party system is broken beyond repair, the US would fare much better under a coalition government.
One potential issue is that I think there are fewer legal requirements, but competitive employers already provide benefits that exceed the legal minima.
This would also allow industry to focus on what industry does which is make money. They no longer would have to spend on expensive Cadillac health care plans in order to compete for employees. Governments job is to keep its populace safe and healthy, that is not the job of private industry.
The only reason we don't have this is due to lobbyists.
Retirement makes sense as this is your source of income. I feel that company resources would be better spent elsewhere than on healthcare.
This would, of course, require universal healthcare or direct market healthcare. This would help new businesses thrive, especially the "mom and pop" types.
I guess I am jaded on this as my parents lost their business when I was growing up due mainly to the cost of healthcare. Not all companies have monolithic budgets.
I doubt most Fortune 500 employees would support turning their company plans into some medicare-for-all. Next step would be turning Social Security over to Goldman Sachs.
Getting health insurance, whether public or private, out of the hands of employers is probably the single best thing that could be done for working conditions in America.
If I've contributed my maximum amount in 4 days rather than 5, it should not be called part time. Part time should be reserved for instances where you are indeed contributing less than a full amount per week, such that you could hold two part time jobs.
So the question is really why some employers insist on the full 40 rather than being open to a range from 30 to 40.