Ok. I think the Yankees would be good for baseball if there were a more level playing field. Since there isn't, I say they're not.
Going back to what I initially said:
Baseball really does need a salary cap, but the fact is that the sport is more compelling because of the Yankees. And if they were winning every year as a result of their spending, there would have already been some changes made. (The grumblings have become louder in the past two seasons; the Mets GM openly criticized the Yankees spending a few weeks ago.)
I understand your point. I don't think MLB (in particular, the owners' association) will allow this free spending by the Yankees to continue. There's already been complaints about it from other teams, much louder this season than any year past. I mean, we always hear fans and radio show hosts complain about it, but I think this offseason is the first time I can remember an official from another team criticizing them for spending so much.
And by the way, I'm an Angels fan, so I'm as upset about the Yankees spending as anyone else is, considering the way they burned us down to get Teixeira. But it's up to MLB and the owners to do something about it.