That's the thing. No specific amendment or issue has to be the core reason for calling an Article V convention. Just the call from 2/3's of the States. At which time "Congress SHALL call a convention". The Constitution doesn't state that "a convention may only be called to propose a single pre-written amendment and all of the states making up the 2/3's of those calling for a convention must agree to the proposed amendment and only to the single proposal". It just says that when 2/3 of the States call for a convention, the Congress must allow the convention to form. It's a pretty amazing little tidbit (and some may consider it a quirk) in the Constitution. IMO, it means the authors understood that a large federal government could be gridlocked or eventually work against the interests of the States and their People. This Article allows (if enough states have gotten frustrated with the feds) to say "screw you guys, we're the states of "The United States" and we are where the People live, and the People are going to do what you can't/won't". What's interesting to me, is that the calls and supporters of calling an Article V convention are from ALL over the spectrum. Conservatives, Progressives, Libertarians, Anarchists, and the unaligned have expressed interest in an Article V convention. No matter their particular and pet issue, many see it as a way to "update" things when the establishment is encouraged and comfortable with the status quo.