Individually the poor are not too tempting to thieves, for obvious reasons. Mug a banker and you might score a wallet containing a month’s rent. Mug a janitor and you will be lucky to get away with bus fare to flee the crime scene. But as Business Week helpfully pointed out in 2007, the poor in aggregate provide a juicy target for anyone depraved enough to make a business of stealing from them.

The trick is to rob them in ways that are systematic, impersonal, and almost impossible to trace to individual perpetrators. Employers, for example, can simply program their computers to shave a few dollars off each paycheck, or they can require workers to show up 30 minutes or more before the time clock starts ticking.

Lenders, including major credit companies as well as payday lenders, have taken over the traditional role of the street-corner loan shark, charging the poor insanely high rates of interest. When supplemented with late fees (themselves subject to interest), the resulting effective interest rate can be as high as 600% a year, which is perfectly legal in many states.

It’s not just the private sector that’s preying on the poor. Local governments are discovering that they can […]