ETAV8R
Founder of D.E.R.P.
While I will not argue against many politicians being boneheads, the core of the problem (this time) is this thing called the economy. You may have heard that the economy tanked recently. State revenues are way down, so cuts must be made. Voters declined to explicitly fund the parks, so the parks go on the chopping block like many other items.
There are many variables here. If parks are viable options to for the chopping block then so are schools, pensions, and wages for state employees. I have a teenage daughter so I do care about public education. I also have friends who work in the public sector and they are doing far better than I am in the private sector. Revenue and business tax payments are down for respective reasons. Most companies don't even want to be here in CA so there is less tax revenue from business. I'm a CA native and the state of our State saddens me.
When parks are closed and unused they are not maintained anymore. If and when they reopen the cost to get them back up to speed will be substantial.