A Useless Study Into Libertarian Morality

So through the magic of googling "Libertarian morality" I came across a study which observes what are said to be the "moral foundations" of humanity and looks at how conservatives and liberals-and now libertarians- identify with these foundations.

The problem is when you actually break it down, it's a poll which looks at random attributes and how conservatives, liberals etc. identify with them. How do we know that these arbitrary traits are in fact the "moral foundations" of society? I don't know but apparently the guy who made the test does. 

Jonathan Haidt, the maker of the test expains his theory in this Ted talk:

Actually the real purpose of the test was to include libertarians and to show they have some sort of coherent morality and aren't just "amoral calculating rationalists" as Reason magazine puts it. So how did they prove it? Well the study found that libertarians scored low on all the traits that make up the "moral foundations" of society which of course proves...well actually it doesn't prove anything, in fact, it might just prove that libertarians don't have any moral foundation. 

So to remedy this problem the researchers realized there was an awful "liberal bias" in the test by not including Liberty as one of the foundations because...it's liberal to hate liberty? And apparently these "moral foundations" are so malleable that suddenly the Five Moral Foundations™ became six?

Well anyways, libertarians scored highest on liberty showing they really love freedom and that tweaking arbitrary traits in a personality test can prove anything.