I disagree, and feel as I mentioned that they candidate's history is more relevant than their age and a non-defined over-qualification. In any case, when that's a worry, bring it up as a concern during the hiring process, work it out with the candidate. Now I cannot deny it happens, as demonstrated by @WillPostForFood in this sub-thread, but that does not mean everybody, not even most candidates think along the same lines. A lot just want an honest job that pays fairly, and as I stated originally, their history would likely be more telling in that regard.

Overqualification is judged based on job history, though. Unfortunately, having a lot of experience is correlated with age.

I completely agree it should be discussed during the interview, but I don’t think that will always work out for the job candidate.