The intended goal of economic convention, capitalism, socialism, etc. is not to maximize individual wealth, it's to maximize aggregate standard of living in support of social stability and progress.

With capitalism, the profit motive is the grease that lubricates the machine. In principal, it's arguable that capitalism has been the best of a bad set of choices. But, it does rely on the supply/demand of human labour as a critical input. Any destablization of that input threatens the stability of the entire system.

Technology driven substitution of machine labour for human labour is accellerating at close to exponential rates driven by "Moore's Law". The math is simple and unforgiving. As a result the cost of production of goods and services doesn't provide the level of income for human labour than it did. This destablizing effect must be addressed in order for capitalism to survive.