Thomas Sowell speaks some sense on the emotional hostility to prisons among liberals and their utopian belief in alternatives that address “root causes”:

Back in 1997, New York Times writer Fox Butterfield expressed the same lament under the headline, “Crime Keeps on Falling, But Prisons Keep on Filling.” Then, as now, liberals seemed to find it puzzling that crime rates go down when more criminals are put behind bars.

Nor is it surprising that the left uses an old and irrelevant comparison — between the cost of keeping a criminal behind bars versus the cost of higher education. According to the Times, “Vermont, Connecticut, Delaware, Michigan, and Oregon devote as much or more to corrections as they do to higher education.”

The relevant comparison would be between the cost of keeping a criminal behind bars and the cost of letting him loose in society. But neither the New York Times nor others on the left show any interest in that comparison.

In Britain, the total cost of the prison system per year was found to be £1.9 billion, while the financial cost alone of the crimes committed per year by criminals was estimated at £60 billion.

The big difference between the two kinds of costs is not just in their amounts. The cost of locking up criminals has to be paid out of government budgets that politicians would prefer to spend on giveaway programs that are more likely to get them re-elected. But the far higher costs of letting criminals loose is paid by the general public in both money and in being subjected to violence.