- numbers games: this is just a lottery, only with better payouts
- drugs: already addressed
- prostitution: legal in many countries
- loan sharking: this is just lending to risky borrowers at market rates, when lending at market rates is made illegal
- protection racket: the only real crime here (and, like numbers games, the State hates competition…)
I'd be fine legalising all but the protection racket, because it really is a racket.
