What I think most are missing is that I mentioned only four players total. Magic and Isiah are two of the 4 or 5 best PGs ever. Parker happens to be playing on the same team as the best player of the last 10 years and Chauncey's Pistons were a team concept team that is as big an aberration as there is in NBA history.
History shows that most championship teams win their best player is not a PG. I don't think a team can win with a bad player being a starting PG often but there is a lot more examples of PG being the worst of a championship team's starting five players than there is of PG being a championship team's best starting player.
Almost every team that wins a title has a top big man and two other good/great players. PGs are rarely the best player on a title team (aside from the two you listed) but aside from Jordan and Kobe and maybe Wade the sg is never the best player. Aside from Bird how many small forwards were the best player on the team? Does that mean that, since the sf is rarely the best player and frequently average or worse players, that we shouldn't pay Pierce more than $8M a year? No, because a sf can be one of your 2 good/great players that go with the franchise big, just like a pg can.
I'm not arguing anything of what you have to say. Having a great PG with 2 other great players is a very good to excellent formula to winning a championship.
I just think that PG is the position I would least worry about if trying to build a starting five to win a championship and I think, in many ways, history bears that out. It has been only the very best PGs in the history of the league that won championships while they were one of the say 2 best players on their respective teams.
And because of that opinion, if I am a GM and am going to purposely overpay a player to retain them, the PG position is the one position that is least likely for me to overpay, that's all I am saying. Just my opinion though and could easily differ from the way someone else could build a team.
Jon mentioned he thought we should overpay Rondo to retain him because elite PGs are hard to get a hold of. I just think they are the least important of position players to have to build a champion so there's no need to overpay for Rondo. Though if we have two other superstars to pair with him for the future then overpaying him to be the third great player, like you are suggesting, makes sense. Problem is that Rondo will be playing well beyond the years when the Big Three will be stars any longer and there's no guarantee there will be other stars around to surround Rondo with, hence my trepidation of overpaying him.