It’s because money and resources are only valuable in a literal, clinical way. It’s a math problem that beats us over the head until we start thinking that’s how you measure value. That crap is how we sustain our bodies but not our “spirit.” True value comes from humans transmuting basic matter into feelings, sentiments, memories. All the money in the world couldn’t help Gates buy a good gift for himself. He needs people close to him to transmute objects into meaningful gifts.
I think the richer you are, the more aware you are that “money can’t buy happiness.” When we plebs hear this we can’t help but think about the literal value of things, but if you’re rich it takes on a different connotation. Though I can only assume and extrapolate what it must be like.