Stuff*
What stuff? Is he struggling to own more than one car? I get it, the figure is more, but what can he not buy today, that he can buy tomorrow? Not much in reality. His life will not be increased in any major way, except for perhaps another car or house but he already can afford those. Holidays? Three houses? Ten cars? An Island? He can afford that now.
There is a quote in Chinatown when Jack Nicholson's character asked a multimillionaire baron who is undertaking more shady deals that are harming people "how much better can you eat?" and that is my opinion, how much better can his life get by staying in Madrid? Imagine he went back to Spurs and won them trophies or to Juve and won more trophies? Seems non of these things are of interest and that is OK, perhaps he sees this as just a job, again that is OK. Do I want someone with that mentality at my club? Absolutely not.
Like I get it, but would I personally waste years of my career when I am beyond financially secure playing golf? No. It smacks of ego and two fingers up to Madrid.