It's a shame there's no room for people who want to work less. Some people see that they can do a job faster and think of the higher productivity they now have space for. They expect higher compensation for their new ability to do more work in the same hours. Other people see that they can do a job faster and think of the extra free time they now have space for. They expect the same compensation and the same amount of tasks, but fewer butt in chair hours.
The system we live in only has room for the former, and often people don't even get the higher comp for being extra productive. They have to take the new skills and leave for a different job. Nobody gets to (openly) work less.
I think you need to become more independent from the 'system' you describe; i.e. go freelance / contractor / consultant / remote etc., some variation of these.
I think I really don't trust the author of Rich dad poor dad but the one thing he got right is the ESBI system ("cashflow quadrants"). — I'll let you google but the gist of it is simple: there are only two limited resources, money and time, and any work is a trade of one for the other. You want to be in a position wherein you generate 'enough' money to 'buy back time' essentially. That means being either a business owner (B quadrant) and/or an investor (I quadrant).
Freelancing is the "S" (specialist) quadrant, you don't want to be there forever — because revenue only comes from putting in hours, it's a neverending grinding wheel, however profitable it seems. What you want is to setup your 'freelancing' as a 'specialist' to grow into hiring people and thus become a business.
Never forget that more than 80% of GDP in rich countries is made by small businesses. Groups of 2, 5, 10, 20 people make up the effective wealth of our economies.
Deep down that's what The Millionaire Fastlane or The 4-Hour Week expose to the general public, this idea of relative independence combined with a business model that cumulatively earns you ever more time — and hiring is key to unlocking that, multiplying manhours around your activity, sharing the load, not being "required" yourself for the business to run. A group of well-organized devs could probably wrap 30-hours weeks and still make a ton of money.
The system we live in only has room for the former, and often people don't even get the higher comp for being extra productive. They have to take the new skills and leave for a different job. Nobody gets to (openly) work less.