I love these kinds of threads because it gives non-Americans a chance at taking a stab at something the US does incorrectly -- at least in their opinions. Guy gets 7 years for burglary and people damn US penal system because they don't realize he's been arrested before for burglary and Steve's house wasn't the only one he broke into in this charge. Seven is an extremely light sentence for what he did considering his history. Many judges would have just thrown the book at him. If he behaves himself he'll serve 3.5 years and get out on parole, serve the rest on probation.
Meanwhile a sicko in Norway pulls an Oklahoma City by blowing up a building then decides to go on a shooting rampage. He gets 21 years in a prison many of us would probably commit a crime to live in. However, before we laugh at how stupid the 21 year sentence is the state can keep him there as long as he's deemed a threat. So, they say he has 21 years but he really has life or near-life in prison. Penal systems are vastly different around the world, and all have their ups and downs.
That's not to say there's nothing wrong with our penal system in the US, but if we took away the people in our country in jail or prison for simple possession of marijuana we'd still have an incarceration rate on the high side but not so astronomically higher than the rest of our economic neighbors. It's part of the result of the US's lovely war on drugs that's destroying our neighbors to the south and making us go further bankrupt over nothing. The resultant middling high incarceration rate from getting rid of weed lovers would simply be due to our higher handgun murder rate, and that's for another discussion...