If this were so then consumption would also have fallen. Now if real wages had fallen then productivity must have fallen in absolute terms which means that the amount of work-time needed to buy goods must have grown, i.e., purchasing power must have fallen. In fact, purchasing power has risen and continues to rise. This is why in terms of work-time the vast majority of goods have fallen and continue to fall. Their claims about low wage rates leading to falling productivity are equally false and is clearly a case of putting the cart before the horse.
Productivity is basically a function of per capita investment.
If this falls so will real wages. Yet they never once refer to this relationship. Now I noted that they ignored manufacturing productivity. Let's use a few productivity figures to lighten Buchanan and Watson's bleak economic landscape. Furthermore, they seem unable to distinguish between value productivity and physical productivity.