If anybody in this league doesn't think about money (except for the really rich guys), he's either imbecile or he's lying. Money is very important, beyond the security it brings, it also gives you recognition. But most of all, it's about security.
You might think that Calderon
making 3 million a year is plenty, but you never know if next season is not your last, you're always one injury away from retirement. Also from those 3 millions, Jose probably see about 1.5, after all the taxes and agents and all that ...
On the other hand, if money becomes so important that for a 5% raise you're willing to dump your team/colleagues - that's a different story.