Right, but in the end it sounds like this: because some (or many) employers don't have a good judgement, we should simply hide the past to everyone. It sounds like a collective punishment to me.

In the end, you cannot make the universe fair by enacting human laws. Paid or not, mistakes from the past exist even if you hide it under the carpet. Same as you need to learn from history, not to ignore it, this particular history should be available, not hidden.