Dude, why are you thinking backward on this? The answer is to restore to everyone the same rights that the California public employees have retained. The only reason you pay into Social Security is that everyone looks at public employee pensions as something that should be taken away, instead of something that should be emulated.
The San Diego situation is not representative of how public pensions generally work. The vast majority of public employees pay the same amount toward their pension that would have gone into SS. In return they receive a sustainable pension that provides a comfortable retirement.
The "overgenerous" benefits that everyone complains about could easily be available for every legal resident in the US, if everyone wasn't so busy being outraged at the wrong people.
You are partly misinformed. While I agree with your first point about demanding an option to leave social security, your point about sustainable pensions is not accuarate. It is difficult to make a general statement about state and local government pensions because of the wide variance. There are a number of prominent states (California, Illinois, New Jersey, New York, Washington, and California) with extremely generous pension plans. These plans are just disguised forms of deferred compensation. The amount of deferred compensation could not be replicated with a 401K. The public employee is receiving very high returns with no risk. The 401K employee would need to bear lots of risk to replicate the returns in these defined benefit plans.
Here is my study about the deferred compensation in Colorado pensions.
Abbreviated version: http://www.i2i.org/articles/IB-2007-D.pdf
Full version: http://ssrn.com/abstract=985621
Too much reason for a topic intended to produce hysteria. Cut it out.