"Gen X is skeptical of whether or not Social Security will provide for their needs — or if it will even exist by the time they retire. "

Well, I think they can be pretty sure that it wont exist by the time they retire, since the capitalist establishments of various countries in the West are still continuing the 'Sell everything and let god sort the rest out' economic policy of the sociopathic Reagan/Thatcher era. And they will do that until they are stopped and the damage they did is reversed.