I don't see how such "overwhelming support" would ever materialise.  Anyone with eyes can see what effect unbridled money printing has done to the fiat economy, so I don't see why anyone would be willing to jeopardise introducing such a practice here when what we have works so well.  Perhaps "mathematically limited" is an incorrect way to phrase it, I can't really argue with that one.  But the 21 million cap is absolutely considered a fundamental principle.