Why do companies hire people to be idle a lot of the time?

from blog ntietz.com blog, | ↗ original
The biggest tech companies employ a lot of engineers. In 2021, Microsoft employed over 100,000 software engineers. That is just mind boggling scale to me. It's roughly as many people as the whole county I grew up in. They are paying a lot of engineers. Some of them do very little, with employees saying they "were paid to do little-to-no work"1....