@DY:
It’s well known that bombers inflict on average 2.92 IPCs per raid while only costing the attacker 2 (it used to be 2.5 average cost)
The point is, economic power houses such as the Western Allies can happily afford to trade + 0.92 IPCs per SBR while Germany really cannot.
I think it is worthwhile to point out that if bombers are really that effective, then they are that effective for everyone. The Allies may start out with more bombers, but the Axis powers can quickly even the score if they want to. So in that respect, if the bomber advantage is available to everyone, then I think it keeps the game balanced. Different, but balanced.
Second, money plowed into bombers is not being put into other units, particularly ground units that can take territory and, in the case of certain countries, naval units to get your ground units to the fight. Thus, I feel there is a natural cap on the number of bombers that anyone should be buying.
Finally, in general I do not believe that SBR’s are the best use of one’s bombers. As already pointed out, the expected net IPC gain is only 1 IPC per bmbr per IC (and that doesn’t count the impact of the damage cap on ICs). In any other battle where a bmbr is augmenting an attack, and thus relatively free from loss, the expected net IPC damage is at least two (hit on inf), but can go much higher.
That being said, the average expected gain/loss often goes out the window when a key objective must be taken, or a well-timed SBR can support one’s overall strategy. However, buying lots of bombers and relying on SBRs to carry the day strikes me as a less than optimal strategy.
All this presumes a non-tech game. I think the OOB tech rules need some major re-work to keep the game balanced, and one of the big reasons is the huge impact of LRA, HBs, and paratroops - all of which greatly increase the utility of bombers.