Back when I ran a company (well, two, actually--I've had my own business, and was in upper management at another, though not at the same time) I followed a pretty simple formula: If I had a need that could be translated as a job, I hired someone to fulfill that need. My labor needs were generated by my custom; if I was selling product and demand was up, I had more work for people to do and so I hired more. This, in turn, depended on my customers having enough money to buy the products I was selling.
Simple as that.
When policies are such that middle-income-or-below workers' wages remain stagnant for decades, but massive wealth accumulates at the top, the outcome is a falling death-spiral of demand. We're seeing the results of those policies, which have been enacted by both democrats and republicans, over the course of the last few decades. I think it is fair to say that republicans identify more readily with the ideas behind those policies, and also that republicans started the country on the track of following those policies. But democrats have been complicit, and basically followed the program. One is really no better than the other.