I like the idea a lot.
I think historically the USA alone had as much ‘income’ as all axis powers combined.
Ofc that would be too much for a game like A&A, but an increase by bid looks promising. There is 1 downside however:
As hinted on, the USA will already get a massive economy bonus if they go (K)JF first few turns. They can reach all the way into >90IPCs per turn if they take over the Pacific. After that, they spend ~20IPCs in the Pacific to maintain their superior positions and the bulk of their income goes to Europe from then on. That’s about 74IPCs for Europe, plus 30-40 from UK and what’s left of the Russian income (I think Russians can have ~25 per turn left, reduced by German raids).
So with JF the allied economy against Germany + Italy already looks like ~120IPCs versus ~100IPCs (assuming Moscow can survive). Add too much of a bonus to this and the allied position gets too strong.
Unless… I am too optimistic about what economy boost a (K)JF brings for the USA. Don’t have much experience yet with this allied strategy, but I do know that GF gets the allies nowhere but in a bad economic position if Germany is patient and protective. If Germany rushes for Moscow anyway, yeah, that can bring the allies victory. But Germany doesn’t rush nowadays ;-).
And that is indeed my long standing complaint: GF gets the allies nowhere, JF gets them a massive economy boost (if I’m correct), making JF (even add a ‘K’ to this if you want) basically the no-brainer option to go…
Talking history, why not add a ‘scorced earth’ tactic for Russia… Once at war, Russia can:
‘Move’ a minor IC to another area. They can do this only once per game per IC. This also turns the territory the IC originated from, into a value 1 territory, while it increases the economic value of the territory the IC is placed in (most likely anywhere in the Urals) by 1. The IC must move during the purchase phase, must move through Russian territories only and cannot produce units during the placement phase of that turn.
This makes fighting for Moscow more pressing for Germany, as this is now the only factory they can take over. Untill they have it, they must rely on their (very long) supply lines back to Germany itself, or buy factories themselves. This should make the fight on the eastfront much harder, and, for the haters of it, the DS strategy weaker because Germany cannot so quickly add additional land units into Russia anymore and Russia has the option to resume production in the rear, rather than from its ruined factory in Moscow. Unless Germany wants to base bombers in the east, which decreases their flexibility.
To boil it down, I think a +6 economy boost for the USA is about maximum, maybe less if anything like a scorched earth for Russia is also tried. But then again, if both players feel comfortable with a higher bid, why not?