Lots of hippies weren't really idealists, in fact lots of them were much like that article described.
There was a 70s film that's pretty famous in Italy, called Ecce Bombo, in which one of the characters stays in her brother's house and doesn't pay rent, lives on friends' food, gets clothes and all from friends who travel, and generally does nothing but "go around, see people, do stuff", and then goes on about how she's happy just to be sitting in a lawn, chilling with her friend.
I also remember my mom telling me about this apartment close to where she lived in her 20s, owned by a man who lived abroad for 6 months a year due to work, which was "occupied" by a young couple who also had no money, no job, and mostly spent their days doing nothing. They broke into the apartment, changed the lock, and used it to their hearts' content for a few months or so. When the owner came back the couple was out; he saw that the door was locked and called some people to change the lock, and then threw all their stuff out in the street. The couple came back while he was still throwing their stuff out and they even had the nerve to complain!
This lifestyle is nothing new; that it's coming back en masse just means that we're probably going through a down phase as a society.