Dealer openly doing drug deals in our street

I live in an inner city suburb and there is a drug house in a busy thoroughfare with all sorts of unsavoury characters driving by while a guy with a bum bag deals drugs to them. The house is known to police and occasionally raided and arrests are made, but a few months later the dealing starts again with other family members picking up the slack or the arrested ones reappearing (I assume they have done some jail time). The house is near a school and the dealing goes on with kids around. Is there a point where the system is so broken that the police can no longer effectively stop this brazen and open drug dealing?