This is generally not a problem in the US.
I still remember the joke from my first job:
Q: How many people work at this office?
A: About half.
That does not, of course, mean that "most research being produced isn't really research, just people keeping busy" or whatever other nonsense an uninformed outsider feels like spewing.
Workers generally like jobs where the workload is low. Managers gain status by having bigger teams, whether they need the extra people or not. Even investors often prefer hiring (a sign of growth) to layoffs, and executives are mostly concerned with pleasing investors.
Even well run tech companies with money to burn hired more people than they needed.
There are cognitive biases like the self-serving bias, or the IKEA effect, which leads individuals to overvalue their own contributions, as well as subjective importance derived from their immediate impact and daily responsibilities. And of course limited visibility into the broader organizational priorities often obscures how different roles contribute to overall growth and success.