This is a common fable and it doesn't make sense. He increased wages to decrease turnover. It's honestly crazy that Fordist propaganda is still circulating today. The dude was a pro-Nazi freak.
Him being a Nazi sympathizer has nothing to do with this. Also you verified one thing I said and didn't refute the point of my comment about the workday/week.
https://www.forbes.com/sites/timworstall/2012/03/04/the-stor...
https://allthatsinteresting.com/henry-ford-nazi