That theory is the same as the "Jade Emperor Rules the World". It cannot be said to be outdated, because they are both things that cannot be verified or falsified.

As far as pragmatism is concerned, now that the questioner has realized this problem, it proves that it is outdated, at least it is no longer as useful as before.

In terms of academics, in my opinion, the surplus value theory is flawed. It ignores the value of machinery, factories, etc. invested by investors.

If you equate assets such as machine sites to investors' machine slaves, you will find that the so-called surplus value is actually the wages of "machine slaves", and investors only account for the output of "machine slaves" as own.

In terms of politics, it is absolutely correct, because it successfully aroused public anger, created a new class ("New Class"), and caused the most tragic disaster in human history, indirectly causing death. The number exceeds 75 million ("xx Black Book").