It isn't just the hourly pay, it's the cost of pay, benefits, and retirement that costs upwards of $70 per hour, compared to around $48 for non-union automakers operating in the US.
Here's a little fun fact to throw around:
COBURN: In 2007, GM sold 9.37 million cars worldwide. Toyota, that same year, sold 9.37 million cars worldwide. GM lost 38.7 billion. Toyota made 17.7 billion. Therein lies the problem.
Obviously, GM (and Ford and Chrysler) have a problem making money, and that problem is directly related to their excessive labor costs.
It adds up if you add the money being paid to past retirees. The people working today DO NOT get over $70 in bennies and pay. The way the figure is used is a lie.