Consequences and unintended consequences.
How much money is now going into state coffers - and accounted for - that used to find its way up the ladder to criminals and thence into the hands of police and politicians as bribes?
Not saying that none of that money doesn't find its way into extralegal channels but given the option of doing things legally or illegally, or no option but to do things illegally, I'd say it was a pretty safe bet the average entrepreneur is going to stay on the legal side.
For a history lesson, just look at what happened across the USA when prohibition was repealed. People that didn't drink because it was illegal (damn few of them by 1933) probably had a drinky-poo or two just because they could, then after the novelty wore off they were either drunks or went back to their former sober lifestyle. Speakeasys dried up only to be replaced by legitimate bars selling a product of known ingredients; gangsters had to find other means of making money. Drinking overall probably didn't change much, but the avenues of revenue from drinking changed a lot.
