Raising the SS cap may actually lower the amount of money going into SS because people making above $160,000 a year would just register an S Corp, negotiate job offers to be Corp to Corp, and pay themselves "reasonable compensation" as w2 income and take the rest as a distribution that bypasses FICA / Self Employment taxes. The vast majority of people making those salaries are already businesses, and the types of people who are making that much as employees are the ones in high demand who could negotiate that employment setup.
You need a lot of workers to take care of children and the elderly. I'm sure they'll try to remove the cap, but it won't help and Social Security will still be completed f'd unless we somehow fix the demographic problems of having so few workers be of working age or something like AI takes over the entire economy and makes worker productivity unimportant. Otherwise you just don't have enough workers to support the non-workers.
www.urban.org
As a 30 something year old I'm taking my retirement into my own hands and assume social security won't do anything for me in retirement.