A largely transient population creates economic incentives to create and perpetuate all sorts of bad and immoral behavior.
And by "bad and immoral" I'm not talking about drinking to excess and the bar that doesn't ID, I'm talking about running a predatory towing company, being a jerk slumlord landlord because your tenants won't be around to take you to court, etc. etc. Often times the local governments even try and take a cut by engaging in revenue policing (as if they weren't already in a better revenue position than the surrounding towns). And when you're in an economic environment like that the only way to get ahead is to do all the bad things everyone else is doing. You can't run an honest business when your commercial landlord is setting rates based on the profits of all the dishonest businesses.