I dunno - “there is more to life than money” isn’t a horrible idea to perpetuate. But no way in hell should it be in exclusion for the socially mandated ritual of tipping for services that aren’t already properly paid. But, like I said, it is rather tacky. Not sure if I’d go so far as to say “asshole”.
I would be! Haha. Like I said it’s rather tacky, though there are philosophical lessons around money and happiness one can glean not just from Christianity, but from Buddhism and other religions. IIRC Buddhism says money is only temporary and holds no path to happiness. Of course having enough for the basics at least makes life easier and your happiness start on at least a neutral level.