Ron Paul hates Social Security but doesn't mind collecting it. Is that a flip-flop or just outright hypocrisy?
He paid into Social Security, so he deserves to collect it. He wants there to be a way for people to opt out of it. Some people may wish to put the money toward something else instead of giving it to the government.
http://www.ontheissues.org/2012/Ron_Paul_Social_Security.htm explains his view on this in more detail.
So no, I don't think it's hypocritical or flip-flopping. If you were forced to pay money into the program, why shouldn't you collect from it later on?
Our business in life is not to succeed but to continue to fail in high spirits. -- Robert Louis Stevenson