Yep, to keep egos out of the picture, the judgement should be on the answers alone.
That's indeed yet another issue with scoring and status flags. They are largely dependent on the person and not just the individual contributions themselves. That's a well know social effect. The exact same answer from two different people with different social images and status will usually get very different reactions.
You can see this all the time in all situations. But just on this forum, the same happens. In many threads, you'll see several people basically posting the same answer. Some will get a 'thanks', some won't (and no, not necessarily following posting order). What's the value in that? Is adding more buttons and flags going to make things better? I doubt it.
But I'm not surprised Dave got this kind of suggestion. As I said, many people these days just want quick answers to their questions, without having to further work on understanding the answers, checking that they are relevant. They just want quick recipes and move on. That's the opposite of learning.
And, flags and counters are useless if you are a regular on a forum and half know the other regulars and their usual contributions. So that "need" arises mainly from the non-regular users, a number of which fall into the above category; they'll post once, will want quick and authoritative answers, will not even reply back, and you'll never see them again. Until next question.