The problem is, inherent in the idea of "people banding together to increase their wages" is the foundation of communism/socialism. You really can't separate the two.
That is, unless you believe that the workers are so well-attuned to their company's complete finances that they know what it can "afford" to pay. More likely, the workers just look at their supervisors and say "hey, I should be making what they're making" and are clueless as to market forces and why they earn what they earn.