That's who we blame in my world, or the Mayor/City Council depending on the municipal government structure. Then we go yell at those people until they either give the police leeway, funding, and tools; or we boot them out and get someone who will.
But when all is said and done - after criminals do crimes and cops arrest them - it's up to the DA or SA to charge them, and a judge to give them a punishment. Otherwise it's just an annoying cost of doing business for the person committing the crime - occasionally they have to go to court and waste a day before they can get back to work.
Haven't you seen all those cops and police chiefs on TV seething because their Mayor commanded them to stand down while AntiFa/BLM was destroying their cities? Because they know everyone is going, "Why don't the police arrest those people???" and there's nothing they can do about it.