The real problem is this: society as a whole adopted their ideas, even as the original proponenets mostly abandoned them as impractical. Many of the ideas were watered down and bureaucratized, but they are still reconizable.
Why did this happen?
If you can provide a specific example, I could maybe reply in-depth. However, I don't believe that their ideas/philosophy were adopte wholesale by society at large. More than likely the same technologies and/or economics that impacted the hippies also similarly impacted the larger society.