The reserve army theory is false because it rests on a false profit theory. The commonsensers’ profit theory says that profit goes up when wages go down. This is true for a single firm. And here is where the error/mistake/blunder comes in: what is true for a single firm is NOT true for the economy as a whole. In methodological terms, the reserve army theory is a Fallacy of Composition (2014a). In colloquial terms, the reserve army theory falls into the category of Flat-Earth theories which are approximately true for a small part of the picture but false for the full picture.
Until this day, the representative economist has not realized that the overall SYSTEMIC interdependencies establish a POSITIVE feedback loop between the (aggregate) product and the (aggregate) labor market, thus that employment INCREASES when the (average) wage rate INCREASES and vice versa. This explains why wage rate and employment decline in tandem in the exhibits above (See intro).
The formally and empirically correct employment and profit theory is incorporated in two equations.#1
The most elementary version of the correct Employment Law is given on Wikimedia AXEC62
The correct profit equation reads Qm≡Yd+I−Sm (2014b, p. 8, eq. (18)). Legend: Qm monetary profit, Yd distributed profit, Sm monetary saving, I investment expenditures.
These two formulas are testable, so there is no need for further pointless filibustering about pseudo-explanations.
Among the numerous low-IQ economic theories, the orthodox labor market theory (wage down―profit up―employment up and vice versa) is the most idiotic and causes the most social devastations when applied as economic policy.
Kakarot-Handtke, E. (2014a). Profit for Marxists. SSRN Working Paper Series, 2414301: 1–25. URL
Kakarot-Handtke, E. (2014b). The Three Fatal Mistakes of Yesterday Economics: Profit, I=S, Employment. SSRN Working Paper Series, 2489792: 1–13. URL
#1 Have data, lack theory and Essentials of Constructive Heterodoxy: Employment