Where Big Government Leads
Its costs are not benign; in fact, they strike at our civil liberties. While I am strongly for convicted criminals who are inmates paying their entire keep while in jail, Alex Tabarrok at Marginal Revolution blogs that the meter is running and charges are accruing even for those who aren't convicted:

Debtor's prisons are supposed to be illegal in the United States but today poor people who fail to pay even small criminal justice fees are routinely being imprisoned. The problem has gotten worse recently because strapped states have dramatically increased the number of criminal justice fees. In Pennsylvania, for example, the criminal court charges for police transport, sheriff costs, state court costs, postage, and "judgment." Many of these charges are not for any direct costs imposed by the criminal but have been added as revenue enhancers. A $5 fee, for example, supports the County Probation Officers' Firearms Training Fund, an $8 fee supports the Judicial Computer Project, a $250 fee goes to the DNA Detection Fund.

...Many states are now even charging the accused to apply for and use a public defender! As a result, some defendants are discouraged from exercising their rights to an attorney.

Most outrageously, in some states public defender, pre-trial jail and other court fees can be assessed on individuals even when they are not convicted of any crime. Failure to pay criminal justice fees can result in revocation of an individual's drivers license, arrest and imprisonment. Individuals with revoked licenses who drive (say to work to earn money to pay their fees) and are apprehended can be further fined and imprisoned. Unpaid criminal justice debt also results in damaged credit reports and reduced housing and employment prospects.

...It's difficult to argue against criminal justice fees for those who can pay, but for those who cannot- and most criminal defendants are poor-such fees can be a personal and public policy disaster. Criminal justice debt drags people further away from reintegration with civil society. A person's life can spiral out of their control when interest, late fees, revocation of a driver's license and ineligibility for public assistance, mean that unpaid criminal justice debt snowballs. You can't get blood from a stone but if you try, you can break the stone.