“Police unions, private prison corporations, alcohol and beer companies, pharmaceutical companies, and prison guard unions are said to be in the top five in terms of lobbying and paying lawmakers to keep marijuana illegal. Hey, this is DEMOCRACY at work. This is the best system on earth, right? This is the system the U.S. government tells us it wants for Libya, Syria, Iraq, Afghanistan, etc. If some foreign government through its politics forbids women from walking around without burkas on, that is a sign of its tyranny, U.S. officials tell us. But if the existing U.S. system forbids someone from using marijuana or some other drug, this is not infringing rights and it’s not oppressive.”
http://www.lewrockwell.com/lrc-blog/who-wants-marijuana-to-remain-illegal/