Read the article; the county is looking for hard cash not indentured servitude. People who wind up in county jail generally don't have money. It's likely that the county will spend more money trying to collect than they actually take in.
The law of unintended consequences will kick in.
In the beginning traffic tickets were created to remind people to obey traffic laws, it soon became a way for a city to raise money.
If the routine bad guys can not afford to pay for a night in jail, how soon will it be before middle class people get caught up by the law and are forced to spend a night or two in jail.
There are so many laws on the book today that it is possible to break a law without even being aware of it. So like cops looking for that broken tail light, they will begin enforcing some of these more arcane laws just for the revenue.
All of this is just a symptom of what is wrong with the country right now. Governments at all levels have forgotten what there function are and have become social workers. That is they are spending money (money they do not have) on things they have no business spending on.
Governments do not have a money problem they have a spending problem which is why we keep seeing these schemes to get more money.
Somewhere down the line there will be no more money for them to take and this entire house of cards will collapse.