I&#x27;m not sure to what extent they are adhering to the &quot;Labour Theory of Value&quot;, but &#x27;labour power&#x27; is a relatively esoteric concept from Marxist economics. In Marxists economics, labour value is the full price of goods produced with that labour and labour power is the stuff that employees get paid for, and it is traded. The difference is exploitation. It gets into a lot of hair splitting as classical economists poked leaks into Marx&#x27;s theories and he adjusted.<p>The big difference between classical and Marxist economics is that Marxist use labour as the fundamental unit of value while classicals use utility as the unit&#x2F;definition of value.<p>I&#x27;m far from a Marxist, but I&#x27;ve read Das Capital. Interesting read from a history of ideas perspective.