Your description sounds more like typical "holding" companies which don't really produce or do anything (other than "hold" property). As there probably are just losses in these companies, or no profits, you can probably get away without a "staff".

However, if your main business was a "retail" store, and you were the only person operating it but didn't pay yourself a salary, then you run into the problems I described. Essentially, if your corporation is earning revenues, the question becomes how are these being produced if you have no employees.

I'm assuming your doctor/lawyer/CPA reference to being "no problems" means that if there isn't anything else for them to do, they make "less money" in the sense there isn't anything else for them to do. For that, yes, I agree. But like a lot of things, a proper diagnosis requires understanding the entire case. What you described is a bit more reasonable in my mind.