Should we give police less power if it would help justice? Or legalise a form of vigilantes?

I have done many private crime fighting, as the police we have here are useless. In fact they are over weight over paid and under used by their own wishes.
They claim they are hero, but I do the same job for free. And get better results.
Can you do better than the police?
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I think with the right restrictions, Like they have in the wild West of America, bounty hunters and freelance law people. We should have access to any prosecuted against you. Is it fair that you pay taxes for people not only to protect you, but put you in prison?
Should we give police less power if it would help justice? Or legalise a form of vigilantes?
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