Smoke, mirrors and prison.

Reason Magazine - Hit & Run > The Long and the Short of Prison Sentences:

"New York Times legal writer Adam Liptak digs a little deeper into the story of America's astonishingly high incarceration rate and finds that the main explanation is longer sentences, as opposed to more frequent sentences or a higher crime rate:

People who commit nonviolent crimes in the rest of the world are less likely to receive prison time and certainly less likely to receive long sentences. The United States is, for instance, the only advanced country that incarcerates people for minor property crimes like passing bad checks...

Efforts to combat illegal drugs play a major role in explaining long prison sentences in the United States as well. In 1980, there were about 40,000 people in American jails and prisons for drug crimes. These days, there are almost 500,000.

Those figures have drawn contempt from European critics. 'The U.S. pursues the war on drugs with an ignorant fanaticism,' said [prison researcher Vivien] Stern of King's College...."