Schweinsteiger was one of the most important players and a captain in the WC winning German team just a summer before, he is still a great and may i say world class midfielder, he was one of the two most historical players in the current Bayern team and his commercial package is not bad is it?
In the end it was simply not about the money but about how much he gave to Bayern and that they need to grant his wish if for nothing else just to show a respect to him and appreciation for what he did to the club.
With Alonso it was the same, he was one of the most important players in the CL winning team for Real.
When a player who is on the wrong side of 30ies want to move it is never about the money especially if the player spend his best time at the club. Imagine if Ronaldo would come to Perez to ask for a transfer and Perez will say to him: "yes but a buying club will have to pay [insert stupid amount of money] for you". I can't believe Ronaldo would take that easily.
And as i said i don't think the comeback of Ronaldo will be decided on money, in the end if we will want him and he will want to come back we can spend stupid money for him, but i was just saying that i can't see Real asking stupid amount of money for Ronaldo.