The reality is that most of these Millennials will never see a dime of SS by the time they reach full retirement. My financial advisor has basically told me that I’ll be luck if I’m part of the last group of retirees who will get anything out of SS. Which is why my retirement planning is designed to not rely on getting any SS. SS would be considered a ‘bonus’.
Doubt they will either, but when Millennials become the majority voting population (and they will, eventually), they'll just vote to steal (i.e., tax) money out of your private retirement account(s).