Or, to phrase it more accurately, "the Union has been the CAUSE of the U.S. Auto Industry's lack of growth in the past 30 years".
Which is why PUBLIC SECTOR UNIONS ARE THRIVING, because the raping of Taxpayers to funnel to those UNION MEMBERS (and resultant funneling of the Dues to the DNC) is a perpetual $$$$ goldmine, and it will ONLY end in 2 ways: 1) Revolution, or 2) (most likely outcome), the collapse of the Government.
1) and 2) are not incompatible.