I disagree it's about the money but only because there's another equally viable reason, and I'm not sure which one had more weight.
For this team to change it's "style" they need a massive roster makeover. Claude Julien isn't going to be able to implement any system that enables defensemen like Seidenberg, Chara, McQuaid, Miller, Bartkowski to make slick outlet passes and/or break out on their own. And Claude Julien isn't going to be able to implement any system that enables Bergeron, Krejci, Lucic, Eriksson, Smith, Kelly, etc. to trade up-and-down chances with other skilled NHL teams. Every one of those guys, some of them top 5 on this team in talent, is an average or below average skater. It's not a group built to forecheck aggressively and certainly not a group that can take chances and make up for them with speed.
So end of the day, keeping Julien also makes sense given the strengths of the personnel. Until the GM changes the composition of this roster AND finds out if the coach can adapt himself, the best play is to try to win the way they always have, with a slow transition to a different system. Maybe not the answer people want to hear but it's just as viable as the financial reason. And of course it's not the simple, incendiary reason a sports writer is going to want to throw out to the masses.