The non-controversy surrounding Texas governor Rick Perry is the latest in a string of calculated Democrat mud-slinging efforts to tar every possible Republican presidential contender prior to 2016. Chris Christie and Scott Walker have already felt the bite of unjust charges leveled against them. The intention is not to bring down the candidate, but to bring down his (or her popularity). My guess is that next on the list will either be another run at Mitt Romney or perhaps Jeb Bush.
The end goal is perhaps to be able to broad-brush all Republican as corrupt. But even if that doesn't stick, the notion that each contender is corrupt or sinister, makes 2016 easier for Democrats.
There is no other reason for the charges against Perry to have been brought. They won't stick.