People keep tossing around this 50% figure like it's a fact, but do you really think these companies just have half their staff just not doing anything? It just seems absurd, and I honestly don't believe it.
Everywhere I've ever worked, we had 3-4X more work to do than staff to do it. It was always a brutal prioritization problem, and a lot of good projects just didn't get done because they ended up below the cut line, and we just didn't have enough people to do them.
I don't know where all these companies are that have half their staff "not doing anything productive" but I've never worked at one.
What's more likely? 1. Companies are (for reasons unknown) hiring all these people and not having them do anything useful, or 2. These people actually do useful things, but HN commenters don't understand those jobs and simply conclude they're doing nothing?