A tangent to this is the way we conduct drug enforcement in the US. It's much better for police departments to wait until after the dealers make money to catch them so they can seize the cash as part of the crime. This dis-incentivises the actual prevention of the spread of illegal drugs. The entire system is corrupt and there's little to no incentive for the authority to behave in the spirit of the laws they enforce - to raise public health by eliminating the personal health and social problems that drug addition creates.