It’s not as great of a gig as you think.
Nintendo has a “full buyout” agreement with voice actors on their games and they will literally ‘cut-copy-paste’ voice work from old games into new titles years even decades later.
So while Nintendo charges gamers full price for a “new” game, actors who helped build the world get $0. BTW, most game developers/creators pay talent a fee for new titles even when using old work.
Im glad the voice of Mario is happy and maybe he has a special deal that no other VO actor has, but my guess is that he didn’t (and doesn’t) make what you think he makes.