On: What if you did the exact opposite, like rogue bee...

[bee_rider]

Evolution is working for it, on those smaller scales, though. Families will happily help each other, friends don’t need a detailed ledger to figure out who’s buying the next round. Most people have a good inherent sense of fairness I think.

[deburo → bee_rider]

It’s also pretty easy to imagine a family member to whom money is never given because he cannot be trusted.