There’s nothing more annoying than people with nothing to do who don’t have the personal drive to seek and solve problems.
If your employees are busy doing garbage work, they'll only be good at doing garbage work. And the idea of keeping them busy so they're present for later "real" work, you won't perceive your staff as being capable of doing the real work or you actually won't be able to do it.
1) Perception: You'll perceive your staff as too busy to take on the work, and hire more people. You've lost the benefit of that capacity reserve.
2) Actuality: The garbage work will still need to be done. It can't be skipped, and you won't have the ability to do it in 5 minutes (how long it actually takes), it'll still take you weeks to get it done and you'll have no capacity for the "real" work.
If you don't have work for all your staff, that's 100% fine. Find them useful work until the billable hours become available. Send them to training classes so they're a hair better when the work comes in. Have them do maintenance work on your infrastructure (test systems, servers, build systems) so that when the real work comes in everything around them is working smoothly and efficiently.
But under absolutely no circumstances should you ever give them garbage work to keep them busy. It's the dumbest thing a manager can do.
That's totally fine. Garbage work makes the most money for bosses.
If there’s not other pressing needs, and there’s a business need for the work, and you have a sure fire way of solving your problem, then take the path of least resistance and keep your staff from being idle.
If your staff is idle, give them meaningful work, training, or the day off. All of those are better than giving them garbage work.
I was a contractor there for almost a year and was never really given anything of importance (that I could see, anyway) to work on. But, I guess I was still providing value somehow... I hope?
That’s how Friday WFH got cancelled at my previous job
Then a few days or weeks later some difficult work comes by and you’re understaffed and overworking the people you were able to keep.
Besides, the lower case letters still need to be upper case. Don’t you know that most “work” being done around the world isn’t much different?
Are you an engineering manager? This doesn't match my experiences at all.
The opposite problem of people without the drive to find work to do is people driven to constantly change or improve things without clear ideas about why it needs to be done or if it is justifiable. Repeat for a few years and your product is a mish-mash of half completed upgrades held together with twine and yet another rehash in planning to finally fix it all.