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?
Never buy what you do not want because it is cheap; it will be dear to you. -- Thomas Jefferson