Perhaps a better title would be "Mercantilism's fundamental flaw". Rand makes few assumptions regarding the inherent integrity of "leaders"; in fact, she assumes no such integrity, and argues for liberty. While we trip over ourselves (as a society) to give up our freedoms and grant ever more sweeping power to "leaders" to save us, we will reap what we deserve -- ever greater examples of waste, bungling, abuse, malinv…
I hate to bring this to a general discussion of capitalism/Rand etc., but I have a question: How is Rand's "liberty" supposed to be provided? It seems to me we already live in a universe where people have as much free will as we ever will. Some people use this free will to restrict the free will of others. Sometimes this is a government, sometimes it's a corporation, or sometimes it's a kidnapper. But what hypothetic…
Singapore is a case in point, freedom not to be caned for minor infractions vs. freedom to walk around relatively safely in a high density metropolis. Again who is more free is not clear.
I think you are wise to suggest there might be "maximal" achievable liberty. Does the culture of society affect the attainable liberty opportunity set? It seems like it must.