Corporations have many dodges- bought any cereal lately???
Since the cost of living increases no matter the wage paid, the calculus needs to deal with wage increases. Look at all the NOW HIRING signs. If a business closes because they can't find people willing to work for 7.25/hr does the 'calculus' stand the light of day???
You keep ignoring the present for some vague future...
Have you any clue about the cost of mechanization??? The list is long and sad when it comes to VPs deciding on some grandiose project to 'streamline/reduce costs/ make response faster' only to get buried in massive cost over runs. (ask me how I know, it's an amazing look into corporate ignorance and buddy contracts)
But pretend business is run at some kindergarten level of ecomonics...