It is, there is an entire industry based off of keeping people like that in jail for extended sentences in private prisons. Plus, if weed became legal all those people would lose money and a lot of cops in the DEA would lose their jobs as well, which is a main reason why it's so hard to get it legal. And ironically, growers don't want pot to be legal because there is more money in it for them when it's illegal also. If it was legal and everyone had it their prices would drop dramatically. A huge reason why weed wasn't passed in California recently was because of the growers.
I was wondering who the idiots were in that election who voted to keep pot illegal. The movement was gaining so much steam and... nothing.