Some interesting points: ~40% of tipped workers don't make enough to get taxed anyway, no tax on tips would actually advantage better paid workers like casino dealers who don't need the help. NToT is described as a campaign to distract from minimum wage increase initiatives.
https://jacobin.com/2025/07/restaurant-industry-tipped-submi... https://jacobin.com/2020/10/tipped-restaurant-workers-waiter... https://cepr.net/publications/customer-tips-are-providing-th...
Of course, you're still expected to leave a tip and suggested minimum is now 20%, plus even McDonalds is charging $15 for a 4 oz burger, so I rarely go out to eat at places that expect a tip anymore.
I'm not sure why they specifically should be tax exempt though. Cash tips often were, practically speaking, so a lot of tax evasion was happening, but it still seems odd to single them out.