The problem here is you're making assumptions based off of 4e, and we're talking about various other options here KD. Forget about what 4e does, it is irrelevant.
No, it's the only similar mathematical model that we can look at to form a baseline. If you look closer, you'll see that although I based my (rather primitive) examples above on a similar system which is not 4E. But without a detailed mathematical model, we can talk about this until we are blue in the face and assumptions about how it works are merely that, assumptions.
The point of a 'fate point' or whatever exactly you want to call it was to give higher level PCs a better curve in your "few hit points" concept, nothing else mechanically. It works because
It might work, but who's to say that it is even needed? Again, you are making assumptions here about how a different system will work. I'm not convinced it will work they way you are assuming and I'm not convinced that any sort of correction (fate points, or anything else) is even needed.
So, if you have something concrete to back up a position that something else is needed, please post it. Don't just assume that something is needed because as we have seen repeatedly with game systems, the proof is in the pudding, not in the recipe.
There used to be a guy here on the boards that would do statistical analysis on these types of things. I forget his name, but it began with an E. That's the guy we need looking at this.