First let me say that I am a rookie at this game, so my opinion only counts for that much, but, that being said...
Strat bombing is not supposed to be a zero sum game. Part of the logic is that it might cost the UK 10 to cost the Germans 5 (or whatever it actually amounts to). But if the Hun isn't attacking the UK aggresively at the time, i.e. Barbarossa before a proper Sea Lion, paying 10 to cost you 5, helps the Soviets out alot, and if there is a Sea Lion, you have no business bombing Germany anyhow.
Not that I don't sympathize with your point, and in the case of anti-tank, agree. It is unbalanced that one tech helps 20 units while another helps 5. Then again, barring luck, if you pound 5 chits in antitank in an effort to reach 15 asap, you sacrifice some other tech. And if tanks don't progress past at least 11 or 12, they are utterly useless. Sacrificing their mobility carries a cost in itself.
Zapp, please do not read this as a flame, because in spirit I agree with you. But as Immer Etwas stated, this is a game, and playability, balance, enjoyment, etc.., are all paramount to realism or historicity. Try to think of it as a fun game with WW2 window dressings, and purely as fan of the genre you can enjoy it.
If realism and historicity are your desires, I'm not sure when it will be released (only one programmer is working on it for like 3 years now), but a game called "World in Flames" (a port of a 10000 chit board game) is under construcion, and betas are already quasi playable. If anyone's interested in it , I may still have weblinks to where you can download the beta.