From page 50 of Dave Arneson's First Fantasy Campaign:
"Many characters wonder what they should spend their money on and what it will get for them in exchange. [...] Wealth: Merely the stockpiling of Gold, Silver and similar items of value by the player. If these items are stolen, the player loses full value immediately upon discovery and may lose levels as a result."
That will only happen once or twice before reluctant players take advantage of the carousing rules!