American businesses use metric measurements when it suits their economic purposes, as they should. The government already controls enough of our economy - we need no more czars in our lives.
That's exactly correct. Americans have already adopted metric standards where they make the most sense - primarily in manufacturing, where base 10 values provide a consistent means of developing and maintaining quality standards and performance metrics.
But you know what they say: "Give 'em an inch, they'll take 0.9144 meters".