My strategy is to work as long as I can and have to.

Have to means having no debt,.my own land and low living costs. Basically being independent. Then using my career to work 50% with a good salary remote.

If I would not do that, I would do the same as you and look for something good to work on.

For me I would go and find a company which does things for agriculture or other things which helps us all.

Working 40h feels wrong though.