That position is Peter Thiel's apparent perspective as judged by somedude895, not a claim being made by somedude895 himself.
Since Peter Thiel is a libertarian, it's quite reasonable to surmise that he believes America is moving in the direction of social democracy. And if he has in mind the shifting political preferences of younger generations of Americans, I personally think it's a reasonable position to take. Public polling shows that more funding and reform for social programs is increasingly popular with younger Americans.
The US is doing no such thing :-)