It's not related with the contract year. Who claims it doesn't know anything about Splitter.
Tiago was a semi-god in Europe and there was a Tiago Church in Baskonia (the city of Tau Ceramica-Caja Laboral). He was getting too many money there, the biggest clubs of Europe (like CSKA, Olympiakos, Barcelona) were running after him. But he decided to come NBA at 25 years old (for less money) to be a bench player. Because he's ambitious and wants to prove himself. He would get more money in Europe recent 3 years.
He became zero from hero in NBA. In his first year he didn't average more than 13 minutes in the field. He didn't give up, didn't think heading back to Europe. And at last he founded the playing time and he's rocking now.
The money was not a big factor in Splitter's career selections. He always wanted to prove himself and become better. Now he's better.
That's why he won't take money and sit on it. He will play hard even he gets the big paycheck.
CHAMPIONS SPURS - MVP DUNCAN