Well, if you believe that the surplus is sitting in a lockbox until you retire, then you'll be better off waiting for the UFO's to fund your retirement. You must not know the true demographic disaster we're heading for.
You say we need to reduce benefits and raise taxes and make the system needs based. How much would we need to raise taxes and cut benefits to make the system balance? Why not just raise taxes to 100% and let the government take care of all of our needs? It's naive to think the private sector can take care of our needs, isn't it?
I know EXACTLY what is sitting in the lockbox: un-backed, unspecified, but interest bearing IOUs from the general fund. The current paper/electronic fiat dollar that underlies our entire economy is the scary thing. (not any particular program like SS, as you seem to think.)
You say we need to reduce benefits and raise taxes and make the system needs based. How much would we need to raise taxes and cut benefits to make the system balance?
1. For every dollar a person earns in income from any source above, say $20,000 they lose 20 cents on their SS. Therefore, someone who earns 20,000 keeps entire SS benefit; someone who earns $40,000 loses $4,000 of benefits or some such schedule.
2. As longevity increases, raise the retirement age to 68, 69, 70, 71 etc.
3. Raise taxes if necessary beyond this and/or make bigger changes in 1 & 2 above.