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Wow, I've never even considered tipping at Starbucks.

Interesting. I tip at Starbucks always but almost never at Dunks.

I have no fully acceptable-to-me rational explanation for this arbitrary-seeming difference. I can concoct a backwards justification, but I very rarely go to either, so I haven't had to unravel this mystery.

Those arbitrary-seeming differences are everywhere once you try to justify who gets tips and who doesn’t. Pretty much every justification of why tips are great applies to jobs that don’t get tips, and vice versa.

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