Your entire argument against this suggestion is that it would take too much time. Because such a thing has not been done, you have no background on which to base such a claim.
You also have provided no logical reason to believe that this policy would be impractical.
I did not say "round"; I said "heat," meaning - with a few exceptions - eight to ten couples.
Once the couples have taken the floor, the MC would ask the question "Has any judge accepted any fees from a couple on the floor?" Each judge in turn would then call out the number of each couple who had done so. That entire exercise would barely take a minute even if every judge in the panel had accepted fees from every couple.
No, it would take quite a while with 5 or more judges and a 40 or more couple first round, and questionable memories, and inevitable confusion.
In another post, you made this claim:
It is no great mystery to those in the midst of things who various couples are studying with.
Now, suddenly everyone forgets who is working with whom? Even the judges themselves?
People tend to remember things that matter. If this policy becomes a rule and both competitors and judges know that there would be consequences for faulty disclosure, they will remember.
Sounds like you are talking about pro/am with its huge numbers of entries per dancer... in ordinary professional or amateur competitions, there's only one opportunity to place a given couple - and that's if they make the final . . . .
You are trying to obfuscate the issue here. A judge could very well - and in your world, probably would - have several client couples in the competition. Even if he judges each of them only once, his scores for different couples over a series of heats would still establish a pattern if he is not basing those scores on performance.
You seem to be forgetting that the results don't really change at competitions where their coaches are not judging.
I'm not forgetting anything because I have never known that claim to be true and I still don't.
You also forget that you need to convince the majority of the judges in order to get a placement.
The basic principle behind my proposal holds true for one judge or several. You have already said that there are amateurs who take coaching from judges. There's nothing to keep those who can afford it from taking such lessons from several different judges over the course of a year.
I've seen several of the same judges at every competition which I've attended. Were I so inclined, I could buy "coaching" from all of them.
It's genuinely fun to imagine a scenario under my proposal in which every judge in a panel called out the same number. If that couple received first place, the raising of eyebrows among everyone in the hall would create a breeze.
Going back how far?
This is your only legitimate point. I'd say one year. Judges, being human (at least according to Polished), are susceptible to the "What have you done for me lately?" syndrome.
Your only objection to my idea is based on nothing more than supposition.
The more I think about this matter, the more than I realize that it would work - and work well.

jj