There are four resources: steel, supply, oil and coin.
The ceiling of population = the population of all the residence
Population = the ceiling of population x loyalty
Productivity is 100% if sufficient population.
Actual production = max production x productivity
The player can set tax rate for better development.
Coin per hour = idle population x Tax rate x 4
The ceiling of loyalty = 100 – tax rate
The loyalty reduces when the player is defeated – population reduces – productivity reduces – output reduces.