For instance, many people claim that "Without government, there would be no way to be certain that our alcohol isn't poisoned." Interestingly enough, with government, we can be certain that our alcohol will be poisoned. By law, any drinkable alcohol (ethanol) that isn't explicitly approved for drinking (and taxed at the designated rate for drinking alcohol) must be poisoned so as to prevent arbitrage between affordable alcohol and artificially inflated drinking alcohol prices. This is actually the case in almost every consumer good industry. Industrial plastics vs. Dental plastics, and now even software that is designed to stop working at different points in time for different consumers are other prime examples.
I recommend, today, that one watch this video in order to get the basics on what price discrimination actually is, from an economics standpoint, and then read this article about the social impact government involvement in such practices has.