The old idea
A Roman who had done well was expected to pay for something the whole city could enjoy. Not a donation, not a plaque — a day out, staged at his expense, open to everyone. The word for it was munera.
The obligation was the whole point. Having the means was what created it.
Two thousand years later the means look different — a car, a lake, an afternoon, a room nobody is using that weekend. The arrangement has not changed.