Is wealth a measure of how useful you are to society or how much you contribute to economy?

both.

when buys something, hand on money because value or service more value money, otherwise wouldn't hand over, obviously.

means that, no matter how great value of someone's wealth in terms of money, value of satisfaction other people placed on goods , services got money, higher.

applies whether or not person owns money made themselves, or got gift or inheritance else such paris hilton.

applies money, , wealth in terms of money, gained result of voluntary transactions, i.e. market transactions.

wealth or money gained result of government, case different. because government, , state, different private transactions in fundamental way. state definition group in society claiming legal monopoly of use of force or threats of force. if don't want buy weeties, weeties firm can't follow down street demanding payment, or send armed thugs physically force pay whether want or not.

state can , does, that's difference. taxation in fact , law compulsory exaction, not voluntary donation. if don't pay, can , send armed men physically seize compel payment, tazer , shoot if don't, , lock in cage. fact. it's how state gets revenue, makes crime else. that's makes state unique institution in society, , provider of goods , services matter.

when someone's payment *involuntary*, means value they're getting *less* value money, obviously, otherwise compulsion not necessary it. logic applies whether coerced transaction legal - such bank robbery - or illegal - such taxation.

wealth gained result of
- private crime
- taxation, or
- policy e.g. subsidies, income transfers, fed inflating, bailouts, handouts, etc.
is*not* measure of how useful society or how contribute economy. it's measure of how you've been able initiate aggression against person or property of others.

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