You need to be aware that the Girl Scouts are not that liberal, it's just that they are liberal when compared to a bunch of extremely conservative bishops. Are the Girl Scouts in the pocket of Planned Parenthood? That's ridiculous on the face of it- the answer is "of course not."
We need to understand that there is a circular loop in Catholic male hierarchy conservatism. It works like this: The Pope is conservative, so the Pope appoints Cardinals and bishops who are conservative too. The Pope then eventually dies of old age. The college of Cardinals is convened. They select (BIG SURPRISE) another conservative guy to be Pope. The cycle starts over again. There are plenty of liberal people in the holy orders of the Catholic Church. They just don't ever get to serve in positions of power.