> As a general rule, if you’ve served your time, then you’ve repaid your debt to society and should no longer be punished.

If you served your time, you spent the amount of time in prison that the judge decided you should spend in prison. That's it. There is no repayment. There does not have to be any reparation, remorse or consistency to the punishment.

> Having employers apply extra-judicial punishment to those how have already been sentenced and and served their time is kinda barbaric

You probably don't want the pedophile repeat offender to work at your daughters kindergarten. He has no right to be there and he is unsuitable. Not getting a job is not punishment.