[supercat]

Wealthy who are not adding to the economy? Rubbish. Name one.

What about two people whose initials are WJC and HRC?

[Tauzero]

Even they, alas, are contributing to the economy. Provided they don't stick their wealth in a mattress.

[Tralfaze McWatt]

Scam artists are criminals too. Criminals are not net creators of wealth. Criminals may have wealth, but they usually didn't create it. They become wealthy the same way as other natural parasites become wealthy; through thievery and fraud.