Reform & enforcement should be focused on the root of the issue: more temporary parking & to make it more expensive & less convenient to own and store a vehicle in the city.
Parking can never cover its own cost per square foot, hence why there is so little of it outside what the government provides or mandates.
Stronger enforcement via ticketing and towing is the quickest means to clear the bus lanes and bike lanes, after that adding barriers to the most illicitly parked in areas is the next step.
I don't understand the "there will never be enough" part. No one is saying there wont ever be any cases of double parking. But this discussion is about reducing its frequency to some acceptable threshold, something certainly possible. It will certainly cost, just like double parking does.