No, not at all. The Yankees aren't the big bad "evil empire" that other teams like to call them. The Yankees have an owner that puts the money that he makes back into the team, instead of in his pocket. Yes the Yankees play in the biggest market in all of baseball and generate more revenue than every other team, but you can't honestly tell me that teams like the Orioles, Mets (before Minaya), Red Sox, and all of the other big market teams can't afford to be competitive. I could understand that arguement when the Expos were drawing 2000 people per game but not from the Red Sox, not from the Mariners, not from the Astros. If those teams are poorly run (some of them have fairly new stadiums) that isn't the Yankees fault.
If you want to look at why salaries are so out of control, look at the players association and "super agents" like Scott Boras who price their clients right out of places like Kansas City, Oakland, and Florida. Beane (the Oakland GM) knows he might not be able to sign Zito when the season is over so he is exploring trade options, and the teams looking to aquire Zito know that they have no chance of signing him until free agency begins because Boras is his agent. Boras is known for exagerating his clients suitors and abilities for top dollar contracts. He is the "star" of the winter meetings because he is such a liar and he has become a laughingstock.