> My own intuition is that keeping a strong imbalance in power between employer and worker is at best a local maxima for the employer, and much greater profits can be achieved with a more balanced relationship with the workforce.
Cue Henry Ford on wanting his employees to be able to afford his products.
Moreover, it works even better when it's universal. If only your company or your industry had to pay higher wages, that's probably not great for you. Most of your customers aren't your own employees, so most of the benefits go to others while you pay a disproportionate cost.
But doing it for everyone helps everyone. People can afford more of everything, so they buy more of everything, so companies produce more of everything and make more money. Enough at scale to offset the higher wages -- by definition, provided the level of savings is unaffected. And if savings increase then that's good too because "savings" are invested which makes it easier for companies to raise capital.