It's easy to complain about the many problems attendant on trying to survive in California. I lived there for nearly 30 years and loved it, but... it's unaffordable for anyone who didn't buy a house at least 30 years ago. This, however, is merely to note the problem. What is extremely difficult is to envisage solutions (other than the pragmatic one of moving somewhere cheaper). Any subsidies make matters infinitely worse (think the appalling situation in San Francisco, with its inane rent controls). There's not much spare land to build on, and more houses would increase traffic congestion.

One major solution is obvious: companies should be far more comfortable with remote working. But as companies comprise humans, and humans are evolved to operate in small groups in which everyone can see everyone else nearby, very few companies are able to contemplate this solution. Even after the absurd lockdowns blamed on SARS-CoV2 showed that remote working is in many ways better for all concerned, CEOs mostly insisted on everyone coming back into the office as soon as the lockdowns were eased. So much for our supposed ability to perform basic thinking...

As such, until the cost of operating in California becomes so high as to force businesses to relocate elsewhere, California will remain unaffordable for those not engaged in high-salary occupations. It's a shame, but any potential "solution" would almost certainly make things much worse. That's just basic economics, and no amount of shouting will change this fact.