Yes. It allows criminals to network with other criminals while creating hardened, foolish career morons.
There are, of course, the exceptions, however, they are very rare and they typically only end up there once or twice.
We live in a crime and punishment nation, not a rehabilitation nation. Thus we will eventually end up with only two classes...cops and criminals.
If one is not willing to be ensconced in a jack-booted thug uniform and desusionally arrogant self-centered aggressive attitude, then they will be considered the enemy...the criminal.
There will be no innocent, no juries. Just a judge/executioner and he will sit in defiance of all that is sacred, with a button in his hand attached to a trap door beneath the latest victim.
Jails allow us to ignore the many ignorant contributions so many in this country make which enable and create much of the crime. The abusive law enforcement in this nation, including the prosecutors and DAs, coupled with the illegitimate judiciary, merely seek to employ the law as a manipulation, and the courts have sunk to a level of criminality which is mainly designed to work for the guilty, not the innocent. We now accept a system which bows to the economy of the court rather than demanding abrogation of the offense.
Punishment is perverse. Seek to administer to the disease. Crime is spreading like a plague, and it acts much like an epedimic or pandemic in that close proximity many times spreads the infection. Cramming criminals into small boxes together as punishment only exacerbates their propensity to stagnate and promotes recidivism.
Strange how this society prefers to punish rather than prevent. But then it is one of the most profitable ventures in many states and municipalities...in Nevada, it is second only to gambling.