Wouldn’t infantry still require a degree of industrial production since they use a multitude of small arms, equipment, etc? Anyway, manpower points are beyond what I was trying to reconcile, which is the forced link between natural resources and industrial production.
I envisioned a numbering system like 1/4, 3/8, 5/2, etc. where the first number is the income you collect for controlling the territory and the second number for the industrial production capable in that territory. For instance, both E. Indies and Borneo could be 4/1, since the Japanese player should gain significant wealth from expansion but not be able to set up production there. That would make things a bit more realistic. Also, Australia is currently treated as just another island in the south Pacific which shouldn’t be the case. Perhaps values of 2/5 or something like that would reflect its potential for production. Japan itself should be a 4/8 or maybe 4/10 or something similar since it doesn’t have significant natural resources - hence the reason for its expansion in WWII to begin with.