What is Gatsby's view of materialism in The Great Gatsby?

Gatsby views material wealth as largely a means to an end, whether it's winning Daisy's heart or being accepted by the old money elite of East Egg. In such a shallow, superficial world, opulent displays of wealth are a surefire way to impress people. Gatsby makes the fatal mistake, however, of thinking that appearance is everything; that what matters is what people think you are, rather than what you actually are.
And so the vast wealth he's accrued ultimately avails him nothing. Not only does Daisy refuse to leave Tom, but the East Eggers will never accept him as one of their own. They'll gladly go to his lavish parties, eat his food, and drink his champagne, but to them he'll always be a vulgar parvenu, an upstart who's trying to buy his way into high society. Daisy may cry over Gatsby's impressive collection of shirts, but that doesn't mean she's about to ditch Tom to be with Jay. Good breeding and background still matter in this world, after all, and no amount of wealth, no matter how phenomenal, is ever going to change that.