Ah intelligence and aptitude isn’t all it is cracked up to be.
I believe that, along with the potential for enlightenment and intelligence, we also possess the deep-seated need to be lazy. Take shortcuts, especially when we think our intelligence enables us to get to point be without touching all the bases the stupid people must touch.
A lavish lifestyle comes from amassing money and balancing the life sacrificed in getting that money. The money must come from other people or groups of people so it becomes a competition thing on one of a few levels.
What is really grinding my gears lately is the governmental sacrifice of helping and serving the people for fiscal “responsibility” or efficiency. Of course this is just masked greed and the policy makers are so far from the needy on purpose, it is easy to cut them off.
The only reason I would accumulate beyond my means is so that I could help others. Share the wealth and take care of other people. Too bad this isn’t the general global attitude like you say.