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Most people who criticise judges generally are incredibly ignorant about the whole legal system and what punishments actually mean / are trying to achieve. The vast majority of judges get it pretty right, and if not then either party can just appeal the decision to a more senior judge.
Being a Director of a small legal firm with 14 solicitors, I can guarantee you that a significant portion of the criticism judges receive is well deserved and not ignorant.
It is a huge issue how out of touch the majority of judges are from mainstream society & this stems in part, from most judges living in the wealthiest suburbs of the capital cities & mixing with the top end of town.
Living in ease, in almost crime free enclaves will tend to cause a markedly different exercise of discretions when compared to someone exercising those same discretions but residing in poor suburbs with higher risks of experiencing burglary, violence & drug abuse.
The US style system of electing judges has some merit, given the vast majority of us will never be able to have any influence on who sits in judgement on us.