And these 2 are related ... how ?
California is broke, which is what causes those underfunding issues. Why ? Nobody is blaming rent control. It's there, but it's so small it registers on very few radars.
Rightist view: http://www.businessinsider.com.au/reasons-to-leave-californi... (TLDR: unemployment (due to various high taxes, rightist site indeed), debt (pension/unemployment liabilities), poverty)
Leftist view: http://www.huffingtonpost.com/bob-samuels/why-california-is-... (TLDR: tax exemptions for large corporations, including the claim they wouldn't leave for high tax because of good schools)
Re: the financial situation, California only recently paid off debts left over from the wake of Enron criminal fraud days.[1]
Obviously the underfunded retirement funds are huge looming unknowns, but they are partially (if not mostly) caused by local governments (such as the city of Stockton) underfunding during the bull market years and being unable to pay during the bear market years.
[1] https://en.wikipedia.org/wiki/California_electricity_crisis
I would hope the city would offer to partner with a shrinking small town to help relocate people who can no longer afford to live in the city to a town that is suffering from a high rental vacancy rate. A pensioner will only continue to be squeezed by living in a high-demand city as even rent-controlled units are allowed to raise their rents.