People who feel guilty about having 'too much', in actuality, feel pleasure in feeling guilty. Its a double pleasure, possession of material wealth and the guilt that comes with it. But its a sort of pleasure, the same way that pain can be a pleasure for a masochist.
The truth is that people never feel they have enough, in fact those with too much wealth feel even worse because their money can never buy them true happiness and fulfillment that comes with - in photographic terms - quality of one's photos and the reception of it by others... At least the poor photographer has 'the hope' that by better gear and travel he can do 'better'... the wealthy photographer knows with a sinking feeling that no gear or travel will make him 'better', so his perpetually depressed, and wealth makes the depression heavier, because false hope is better than no hope.
Btw, these are some of the wisdom that have been passed down to me by one of my teachers and the more I reflect on it, the more i see how correct he was.