In The Monopoly of Credit (1931), C.H. Douglas presents his second proof for the A+B theorem, arguing that the two core accountancy cycles of an industrial economy: the creation and destruction of money (Cycle 1) and the creation and liquidation of costs (Cycle 2) are misaligned, resulting in a systemic deficiency in purchasing power. The money cycle (Cycle 1) operates at a faster pace than the cost creation and liquidation cycle (Cycle 2), creating a gap between prices and purchasing power that widens with greater dyssynchrony and narrows with greater synchrony. Indeed, if the cycles were perfectly aligned, money creation/spending and cost creation/liquidation would occur simultaneously, eliminating the gap entirely.
[1] C.H. Douglas, The Monopoly of Credit 4th edition (Sudbury, England: Bloomfield Books, 1979), 46-50.