Earlier quoted context omitted.
In "defrags" like this, Google does not lay off people outright, it just tells them their job is going away and they have X months to find a new one within Google -- and they usually do.
This is a very smart tactic that also, as a side effect, brings the average quality across all engineers at the company up. Smart people with desirable skills would have no problem finding another team within Google to transfer to, while bottom tier performers won’t, thus leaving Google.
As to people on re-deployment, it did happen that poor performers had a hard time landing a new role -- but then again, they would have had a hard time staying in the company in their old role, so that kind of fits your point. But Intel didn't use redeployment as a "shadow RIF". Intel was not shy about moving people out of the company -- they didn't need to nor bother to hide it.
Back to redeployment -- I can remember occasions of fairly large redeployments (business unit shutting down) where those of us in parts of the company considered more strategic would find ourselves suddenly rich in hiring reqs. Again, the company created the right market conditions and let the hiring managers and employees sort it out.