If Germany is building INF THAT heavilly, then you have lost the offensive against Russia and are trading much closer to the vest as Germany. That means Russia poses a greater threat, and that Germany has to fight harder just to stay in the 30’s for income.
You cannot BOTH build all INF AND trade at the Archangel/WR/Caucuses frontier turn after turn as Germany. Sorry, it just does NOT happen unless MASSIVE dice fracks come into play early in the game (or unless the Allies are playing poorly).
What games are you playing?
I hardly see G trade Arch, except rnd 1, never WRU, and when G starts trading cauc thats bad for allies.