WRT to this whole McDonald's thing, I'm going to speak to this as a long time union member/activist.
If you've wasted enough time reading my posts, you probably know I've been on and led bargaining teams that have negotiated multi 10s of million dollar contracts with the University of California and gotten very, very substantial wage increases for thousands of employees. I'll have to double check, but last time I looked, the University of California withstood my left wing onslaught and continues in its stated mission of teaching, research, and community service (that's sarcasm for those of you who didn't guess).
The myth that you can't pay people a decent, livable wage and run a business, is just that....a myth. Not only is it a myth, it is shown to be false by more examples than I can possibly add here (though my sometimes friend and sometimes debate competitor
@moviedoors could probably make a good run at it.
). In fact, paying good wages is the best way to strengthen the economy. Look at what happens to local economies when a WalMart opens in a community. It leads to low wages and decimation of local businesses.
If what you mean by a good economy is the accumulation of wealth by a small percentage of the population, low wages is the way to go. If what you mean by a good economy is more money in the pocket of consumers and a robust demand for goods and services that increase the quality of our lives, I suggest paying people, at the very MINIMUM, a living wage that allows them to have decent housing, healthy food, and some comfort and entertainment in their non-working hours. Rising inequality in income distribution IS the cause of a bad economy, it just depends on what your definition of a "good" economy is. Every, single job in this country could be a union job and not only wouldn't it hurt the economy, it would help it.
Also, there are economic models that would provide a better economy than private industry, but that's another discussion.