Complex sentence: He proposes that the 2008 financial crisis compounded this position; rather than catalyzing a desire to seek alternatives for the existing model, the response to the crisis reinforced the notion that modifications must be made within the existing system.
Split into simpler sentences: He proposes that the 2008 financial crisis compounded this position. Rather than catalyzing a desire to seek alternatives for the existing model, the crisis reinforced the notion that modifications must be made within the existing system.