The problem with this is that many costs are inherently competitive. The pizza metaphor starts to break down here but I'll try to maintain it. The problem is t

The problem with this is that many costs are inherently competitive. The pizza metaphor starts to break down here but I'll try to maintain it. The problem is that share is a flow, not a fixed quantity to be divided up. Because of competition for resources, people are forced to use part of their share of those resources to compete for future resources. You've got to use part of your slice to ensure that you keep getting slices. When the pie increases but your share stays the same you need increase the amount of your share allocated towards ensuring future slices, meaning that the amount you actually get to eat diminishes.