I feel like one of us is missing something. It might be me for all I can tell. From my brief glance over the suggestion, it removes all stat boosting items from the game and gives everyone a set schedule of stat boosts to replace them. Something similar is done with enhancement bonuses to attack, damage, armor, etc.
Suppose I'm playing a Paladin and you're playing a Fighter. We're both (for the sake of argument) melee dudes, so we all want the relevant stats -- we like Strength and Con and so on. But, a bunch of my jazzy class abilities also require Charisma (not to mention my spellcasting requires Wisdom, but that's kind of a side thing).
Now, in baseline D&D, I could very much imagine the Paladin wanting to spend some of his gold on some boosting Charisma abilities, whereas the Fighter might prefer to spend them on other items, perhaps some of those cool tactical swift action ones in MiC. What I'm saying is that the proposed system removes those choices. And, it's not like there are a lot of ways outside of magic items to boost stats or a lot of things that depend on stats.
That strikes me as a bad thing. Or, am I missing something? While it may clean up some imbalances, it's removing some viable character choices. If I were playing the Paladin I might justifiably be annoyed by just this sort of thing.
Now, I don't want to turn this into another caster v. non-caster debate or anything. I picked the two examples above -- Paladin and Fighter -- b/c they were just the sort of people who might actually care about this sort of rule. The Conjurer, etc. are indifferent. I think Veekie's right in that they lose out b/c they can't cannibalize those resources for something else, but I think we all agree that's fine.
Please let me know what you think.
P.S.: mucking with the numbers is part and parcel of D&D. Many class abilities, ranging from humble Iron Will to Divine Grace, are designed to do just that. You're investing resources into saying "I'm really really good at this so it's unlikely that I'll fail." I think the idea of "maintenance" magic items is dumb, it's just a trap for newbies, but the idea of someone committing resources to being the hardiest in the land or having a tower of iron will not only seems fine to me, but good.