> I can understand (if not condone) the birthday party thing, where you spend millions to get someone famous at your party, as by doing so you are saying "I have so many millions, I can do this ridiculous thing, or buy a famous painting, and still be richer than you". But it seems weird that it's a booming and widespread business model.

The rich are growing richer and the wealth gap is deepening, is happens all the time until the lower classes can no longer stand the abuse and revolt, after which usually a subset of the upper classes gets power and makes minor concessions to calm the mob. Usually this is followed by increased propaganda and controls to prevent another revolt from happening which leads to the people losing more power. Most of the media and sources of information are already in the hands of the elite and allied with their interests, so revolts are less likely and usually easily suppressed. The cycle continues. A police state and an Elysium-style separation of the elite from the plebs seems closer every day. People find it easier to ignore the struggle and suffering of people far away or people they don't see, even the impoverished and homeless in their own cities, because the media mostly ignores them, but most don't realize that they will soon also be in this class of ignored, powerless beggars and the elite class will be better protected and more isolated, allowing them to ignore the problems of the lower classes even more.