Inflated Tech valuations are the least of our economy's problems. This article is riding the wave of anti-tech sentiment in an otherwise stagnant, slow-to-recover economy. It's click-baiting and we're all reinforcing this sort of thing by being agitated by it/drawn to it.
Add up all the "bloated" Tech Valuations and you don't get anywhere close to the 1 Trillion+ we're looking at in outstanding student loans and the effects the bubble bursting might have on creditors and debtors alike.
I'd enumerate other much more dangerous threats to our economy, but I just read on Secret that someone is about to acquire my company for 5B.