You've hit upon a good point, leaving aside you neither approving nor disapproving. When read in another way, Hank Rearden's statement "I created that Metal. It is my moral responsibility to know for what purpose I permit it to be used" can be retooled as, "I earned my dollars. It is my moral responsibility to make sure that my dollars don't encourage slavery [or some other evil]."
Rand was an odd bird, and requires some careful reading to get what she really said. When you consider the above, it's true (albeit ironic) that a liberal Fair Trader or Ethical Fund guy can claim to be a legitimate heir of Henry Rearden!
To me, at least, "going Galt" involves an unplugging of yourself from the workforce, if not society in general. For instance, my father was a contractor. After a certain point, every year, he wound up paying 2 out of every 3 dollars he made to the government. Eventually, he said "This is stupid. My time is worth more than 30 cents on the dollar.", and retired to play with his grandkids. IMHO, that's about as "Galt" as you get, in the real world (and without buying a self-sustaining compound in the Montana wilderness...).
Given the current state of affairs, I re-read Atlas Shrugged awhile back. Wordy. Preachy. If Dagny Taggart spent as much time taking care of business as she did sleeping around (or Endlessly Pondering sleeping around...), then she'd have been better off. :-) But, all of the flaws aside, Rand had some exceptional ideas in the book. Too bad that the only people who read and pay attention to it, don't really need to.