It's an adverse selection problem.
People who are most subject to the tax are inclined to leave.
People who benefit the most from the trade are inclined to move in.
This potential tax hike would probably be the proverbial "nail in the coffin" to the state of CA. Just for us we would see our taxes go up the equivelent of doubling our mortgage payment, that is complete insanity and I would expect 80%-90% of all the high earners to flee the state causing its finances to drop off a cliff.
If your net take-home pay goes up (or even stays the same), why would you care if the line item called "CA tax" goes up while the line item called "health insurance payment" goes to zero?
The headline hints that families would be paying those additional taxes, but if you read the details most of the additional taxes are on companies (and the best points that the article makes are about how those are structured in ways that may not make sense). They are trying to mislead you to be outraged in the headline, and it worked.
So the taxes that you and your employer pay would increase (that is what the headline is saying), but much if not all of that would be offset by the costs that you and your employer are currently paying.
Covered CA is the ACA exchange, not a public low-income plan.
Mine (blue shield from a silicon valley employer) is more than that (~$2500) every month.
In San Francisco Bay Area, it's even more stark. There was a 45% decrease in entrances from other states to the Bay Area and a 21% increase in residents leaving for other states.
I'd hope most of us know better than to try and make arguments like this about once-in-a-hundred-year historical anomalies.
Other states are seeing the exact opposite.