You can't change wages directly on your own, no. But the systems that set the wages are not immune to public opinion. (Whether you consider wages to be set by companies, government, or other forces, this holds true.)

Sure, and if I had secured a high income or had established wealth, such a topic might be worth my time.

As an individual, actually saving that money or driving a higher income for myself is a far more effective use of time.

It also has the side-effect of increasing the median wage, because my negotiation provides upward pressure.