Well OP, you're part of the problem. And so is everyone else, it's OUR fault.
As a society, we don't the first clue about what we actually want from our Government. It's easy to be critical, but we have to step back and look at what we created. We got exactly what we "asked" for in terms of public services.
We want the police to deal with ASB, fine, but they better not ever speak to our own child, if they do we will make complaints, accusations and call them bullies.
We want the police to arrest dangerous armed criminals, but those officers better think twice before they use any kind of force, because hey, they're ALL just bullies in uniform and how hard can it be to arrest a skinny 14 year old gang member who just stabbed some kid in the park as part of some gang initiation. I mean come on, using a Taser to arrest an armed criminal, those officers need to be put in prison you all cry.
We want convicted criminals to be locked up, but not actually punished, because that would make them feel stressed, or even, God Forbid, offended! And we don't like the idea that people should have ANY authority over anybody anyway.
We are just as important as our Boss (sorry, supervisor, sorry that word is too aggressive, I meant to say, co-worker) because don't forget, we're all equal.
I could go on, the point is you are unhappy with the sentences, but you're not happy to give the police more powers or the money to buy better equipment. You don't want to pay a single penny more in taxes to build more prisons, and you don't know what you want those prisons to do anyway.
Prison is a 2000 year old solution to a modern problem. People commit crime so we convict them and give them a criminal record. Great, now they can't get a job so have no choice but to commit more crime to get money. We set them up to fail.
Prisons are full, there's no space for the prisoners already in there, let alone new ones. We need to work out what we want the police to do before we even talk about prison sentences.