We could always just subtract a zero for each lower tier.

And it's not about making high-tiers even higher as much as it is about making specialized abilities universally better than non-specialized ones. As it is, only specialized magical or technological abilities have that option. You can't make a competitive high-tier based on strength because any other high-use can use magic/tech/powers to equal their strength, AND do half a dozen other things besides.

EDIT: What Green said.