The major changes you mention are from 40+ years ago. Social security is only played with when there is a funding problem on the horizon. I don't see what is changing for the better.
If we are to consider society as a whole, over time, i think things are moving in a positive direction for the liberties of children and the elderly. It's hard to predict what may or may not change in American legislation in the future, but I doubt it will be "nothing".