Harsh?
They are low class scum who've proven they don't deserve to be part of decent, polite society.
If I had my way, they and people like them would just be executed.
I don't believe in re-education. They knew what they were doing was wrong, they are just morons who thought they'd get away with it, or that the punishment won't be that bad.
Prisons are a waste of money.
In the UK the reoffending rate is/was around 25% and in a recent report they said a failure by the justice system to rehabilitate criminals has led to a £23.6 billion-a-year bill to the economy.
Why do we bother putting people into prisons? A lot of these probably didn't offer much of value to society anyway, even before they were banged up.
I'd rather live in a world where we don't have to lock anything, don't need passwords, can leave our possession anywhere knowing that the social contract will guarantee no-one will touch them, where the cost of crime is so close to zero that prices of things doesn't need to factor in losses from theft etc; and if the price of that near perfect world is the execution of millions of people before reality sinks in and people stop committing crime, then so be it.