Kurz is 35. Someone with the drive to become leader of a country in his 30s is not going to want to spend the next 5 decades gardening.

Perhaps he could dedicate himself to undoing the evil he committed during his term, rather than going to work for an out Fascist?

I was disagreeing with you but after thinking about it some more I wonder if not being able to profit in any way from the work they did as leaders might attract a different kind of people in the first place.

Not practical of course but interesting to think about.