Are we talking about older heads /role players or are we talking about already established superstars? Where are you going with this? Bosh doesn't fit the description of either the old head or role player
LeBron /Bosh are both making $19.1 mil a year, Wade $18.7. It's not exactly a huge paycut they took, obviously a paycut from what their former teams were offering, but as a free agent, it's the option they had.
Now, in order for someone to take a paycut to sign with my team, there would have to be a good reason why. The day we're seeing role players (nevermind the superstars, this isn't the angle you wanna take with this) take paycuts to come here, there must be something really special that could go down as a result of it. The day that happens there (which may never be the case again, I hope I'm wrong), we'll see, but it's not something to worry about.