The snippy little kicks at OP ("you're a hypocrite" or "you can't afford it" ) are so unnecessary and typical of this site.
Here's my take on things.
Due to my sheer fortune in the lottery of life, I live on a farm. I could park 40 vehicles here and not disturb myself or anyone.
I did however live in the borough of Wandsworth once upon a time. I was there pre, and post, the introduction of CPZs.
Controlled parking zones help because if they're not there, you can have someone bring 6 cars (yep this really did happen) to a narrow Victorian terraced street, and destroy whatever parking balance existed if houses had one or two cars per household.
There was never any point arguing about it before as everyone had every right to the kerb so to speak. Which is why a limited number of permits per household is the only solution for this kind of thing.
Back to my point though, I own enough off street parking to deal with my parking "needs". However that doesn't make me think "ooh let me come on this thread and chastise the OP for not provisioning the same".
What an ugly way to behave - why do some people do this?