Here’s a large post, from this very same page, discussing the very same thing:
http://www.axisandallies.org/forums/index.php?topic=36942.0
edit-
And looking at it, you actually made the last post there. I’m confused, and I’ll shut up now.
I have to say I like the idea of giving all nations more money. Perhaps each nation collects their normal income + national objective income and then adds 2d6 bonus economy to add in randomness?
That should only average an extra 6 IPC per nation (6.090909… really) but would be flexible enough to give only +2 or as much as +12 both of which could add some flair and randomness to the game.