It's more than money. They would crack down hard til they had every last number runner brought up on charges. All the little things that slide by would suddenly turn into court cases and prison terms. It would cripple them to an extent they probably couldn't recover from
Exactly. You think that LE doesn't know where every single wire room is located, where every shylock book is, where every construction site is where the building permits aren't up to snuff, etc.?
They just can't be bothered with such nonsense. But hit one of their own, and it's all over. Everything from numbers spots to construction sites employing no-shows on the payroll would get hit with the same zeal that they usually reserve for terrorists and other murderers.
It would be suicide.