Olympus sarl - which is the company that "owns" the Astana team,
is a Luxembourg registered co, and as such, i do not think they are obliged to file public records, or if they do, they will be sufficiently crafted to ensure they divulge very little.
Bruyneel is no fool with finances - he has run teams with rigid rules, and is far from in poverty. He takes advantage of his ability to dictate, and the riders/staff reliance on him, to ensure they retain places in a team.
Astana was born from the ashes of a disastrous association, Biver/Rominger/Vino/ see ref to old cyclingnews articles re the "financial rescue package and the reaction when sponsors ran short the first time.
Then they encountered Bruyneel.
He knows more than most, how to influence riders, when dollars are tight.
At this stage of the season, a financial recession, he can ensure they stay on a reduced salary, or leave them hanging on long enough in that they then have little option to take what is offered, if at all (ref salvodelli negotiations with bruyneel) so even if contador has the balls to jump ship (on the pretext of non performance of a financial contract * asuming he has not been paid) then, he will go to escape, not for funds elsewhere.
In the "big" picture, for him as a rider, that would be the best option.
Bruyneel knows what he is doing, as does LA.