I believe I've found the reason for shit politics, which you've touched
on here.
It applies in lots of different cases.
In this particular one, how does making life tougher for prisoners help
the law abiding? It doesn't.
How does banning gay marriage help straight couples? It doesn't.
It concerns selfishness and jealousy. The true definition of selfishness
is not wanting for oneself but wishing to deny something to others.
Jealousy is in fact often greater between the haves and have nots than
vice versa.
Making life shit for others doesn't actually offer a person any
improvement in their own life. However we're generally brought up with a
pecking order enforced on us- and thus putting someone down by default
pushes us up.
It's sad, but to some extent human nature, and to me shows the
inferiority of politicians who practise such immaturity.