More important, and contrary to what you may have heard, the wages aren't that much bigger than what Honda, Toyota, and other foreign manufacturers pay employees in their U.S. factories. While we can't be sure precisely how much those workers make, because the companies don't make the information public, the best estimates suggests the corresponding 2007 figure for these "transplants"--as the foreign-owned factories are known--was somewhere between $20 and $26 per hour, and most likely around $24 or $25. That would put average worker's annual salary at $52,000 a year.
So the "wage gap," per se, has been a lot smaller than you've heard. And this is no accident. If the transplants paid their employees far less than what the Big Three pay their unionized workers, the United Auto Workers would have a much better shot of organizing the transplants' factories. Those factories remain non-unionized and management very much wants to keep it that way.
But then what's the source of that $70 hourly figure? It didn't come out of thin air. Analysts came up with it by including the cost of all employer-provided benefits--namely, health insurance and pensions--and then dividing by the number of workers. The result, they found, was that benefits for Big Three cost about $42 per hour, per employee. Add that to the wages--again, $28 per hour--and you get the $70 figure. Voila.