We are currently ~3rd richest team when it comes to INCOME. But we do spend money on players salaries. Remember we are the 3rd highest team in Serie A that gives salaraies. We give around 115 million euro a year worth of salaries. We still manage to keep our end budget (net profite) on the +ve side.
We may be getting an income close to Milan and maybe higher than Inter, but currently we don't have a backer. The Agnelli's are working over time to fix FIAT finacial problems. They can't spend money now on Juventus.
Juventus phelosiphy is not to get loans and become on debut just to buy a player or two. And I agree with this kind of philosiphy. This is what I call a long term plan. Keep the club debut free and long as possible.
Just take Lazio as an example:
Every year for the past 3 years they reach to the deadline for paying their debuts. Now their acomulated debuts have reached ~140 million euros.
Milan, Inter, Real Madrid, Chelsea and Barcelona (to a lesser extent) have their backers pumping them with funds to be invested in new players.
Honestly, I think the Trio are genious. With them we managed to win more trophies than any other italian club. Consistancy is the key word.