Gadol – could be, but it’s usually the wealthy and powerful who chazal are referring to when they say “olam hepech reisi,” that olam haba is upside down from this world. Here, those who do not have a lot of money are not regarded in high esteem, while in olam haba, they are. “V’anavim yirshu aretz” the pasuk says.
The neviim often criticized those who were rich and powerful too. I’m not saying that I’m above taavos, and I don’t know what i would do if i suddenly had money…maybe I’d be a worse baal taavah? But that doesn’t mean that our current culture, which bends over backwards to be machnif ashirim, and tell them that their lavish lifestyles are totally fine, is correct.