This or something similar came up not awfully long ago, but I can't track it down.

Through stressing the importance of “institutional complementarities”, varieties of capitalism research advocates a “cover all” argument – actors need to ...
socsci2.ucsd.edu/~aronatas/scrretreat/JongKonChin.doc

Cap't made the very commonsense argument that fast food is garbage.... Args points sounded more like the coverall arguments of the right, ...
www.scienceforums.net/forum/archive/index.php?t-6155.html


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Note added at 9 mins (2008-01-11 01:05:28 GMT)
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It's not fair" is often used as a one-size-fits-all argument when a child feels victimized. In situations where the child has an interest in protecting his ...
edsitement.neh.gov/spotlight.asp?id=109

Haven't you learned yet that using the one size fits all argument that nearly everyone tunes you out. You will be more effective if you were not so abrasive ...
www.autismspeaks.org/community/forums/showthread.php?p=5092...

Hitchens attempts to construct a one-size-fits-all argument against religion. ...
www.skeptic.com/eskeptic/07-05-09.html

The argument that all industry should be nationalised is a "one size fits all" argument. Chavez's demand that the National Assembly give him the right to ...
commentisfree.guardian.co.uk/larry_elliott/2007/01/chavez_and_nationalisation.html

too formal maybe?

pretty standard; check out the 2 links; one definition and one google