Originally Posted by
Gnoman
This. Is. Not. True.
If you gain 5000 GP, you can spend 5000 GP. You do not have to buy any wealth category to do so. No such rule exists in GURPS. There is an explicit advice to require characters that start off with the Poor Disadvantage that gain wealth to buy it off, but that is not the same thing.
If you start a Dead Broke (essentially has nothing) GURPS character who immediately finds a trillion dollars 5 minutes into the adventure, that character can spend a trillion dollars.