The economic illiteracy on display in this thread (and the country at-large) is breathtaking, but clearly par for the course. As I learned in my Econ 1 class back in community college from a professor who was not particularly friendly towards capitalism, but was honest, "Words like 'should' and 'could' are value judgments. They don't belong in economics." When you say "Apple should pay more" or "Apple could pay more", you are not discussing economics; you are making a value judgment, which may hold some kind of value somewhere - but not in the realm of discussing the price for goods and services (which includes labor).
Here's the bummer of the truth: labor is like any other commodity, and the price of labor (i.e. "compensation") is determined by the same mechanism as all other commodities: supply and demand. If Apple, or anyone else, tried to truly underpay their employees, they wouldn't have any employees, or there'd be such a turnover that Apple would lose money on the cost of filling empty positions and training those new workers. I know this sounds cold and unfeeling, but economics is not about feelings. It's about studying human behavior and the allocation of scarce resources. Don't like it? There's only one alternative to the market economy: a command economy. Command economies have born out, in every instance, surpluses and shortages of goods - in other words, an inefficient allocation of scarce resources.
That said, there are many serious problems with our market economy, and not only in the sense of "all human institutions are flawed", which is certainly true. We have unique flaws in our system that I would love to see addressed, but the forces that created these problems are the same forces that prevent their being addressed - and those forces reside in all political parties and the big government bureaucracy, big business, and big labor. That understandably created the reactionary response of "burn it all down" - but then what? A command economy? No, thank you. Better everyone learn a thing or two about economics (not talking about deep dives... just a basic introduction to microeconomics and macroeconomics from a source that isn't predisposed towards Marx and his pathetic failures in predicting the future of capitalism).
Market economies can theoretically be fixed; command economies are flawed by their very nature.