Spurs announced a World record 113m profit in their most recent accounts. If they want a player bad enough they can make it very difficult for that players club to say no.
Question is, how bad do they want Wilf? I'm not so sure they love him as much as the media have made out.
I can see a bit of dancing between Levy and Parish in the summer. Levy will demand a very good deal for Spurs. Parish will (hopefully) not entertain any offer that's less than 60m (especially as we have to give 15% of it to Man United).
And then one of two things will happen. Either someone serious will come in with the kind of serious money it would take to get him or no one will come forward with a tempting enough offer and he'll be staying put for at least another year as no one sells their best player in January.
At the end of the day, at this moment in time he is worth far more to Palace than anyone is willing to pay.

More interesting question: is how can they announce that sort of profit, when they have been renting Wembley for 2 years, spending a reported billion pounds on a new stadium. They haven't spent much on players recently and I doubt they have paid off the new stadium by a long way. I suspect some creative accounting with the stadium costs hidden away to be paid over time, being a drain on any future income for some years.
If they don't qualify for Champions league, they aren't going to be buying anyone.

More interesting question: is how can they announce that sort of profit, when they have been renting Wembley for 2 years, spending a reported billion pounds on a new stadium. They haven't spent much on players recently and I doubt they have paid off the new stadium by a long way.