He said it himself, he doesn't want to have to think about money. He has his plan, it's working good enough, there is no way you will convince him to even speak the word bitcoin.

For him, frugality isn't about fairness or beating inflation, he never even mentioned it.

For him, it's about surviving without evolving. Budgeting is a skill he's learnt and he's good at it. Many bitcoiners are good at it too, but this is where it stops for him. He's done it, it worked, he has no ambition to improve it.

It's only when frugality is no longer enough, that he will look into anything else.