I have no problem with elderly people getting back the money they have paid into the fraudulent system. The people who came before them, who implemented or supported these programs in the first place, definitely should have been more mindful of the long-term consequences. However, I definitely do not want to pay for other people and then have nothing left over for my generation. As a young person, I would definitely be interested in opting out of this massive scam in the first place. Unfortunately, few voices of reason are listening to the younger generation's pleas.
I do think there is a certain degree of selfishness going on here, but I'm not sure if I can blame a lot of older people for it - they do not yet realize they are victims of the system in the first place. Are they greedy? Maybe, but it's pretty understandable given the situation.