Anyway, nope, its not a rational system, you dont even have to read Marx or any of the like minded critiques of classical economics, which mutated into (fiscal/free market/capitalist) libertarianism, to know that because it'd been amply critiqued from all directions before Marx took up the baton with the suggestion that socialism and an end to class struggle could be the way out.
Bottle necks, boom and bust, diminishing returns, all those economic contradictions had been examined at length, mainly by english political economists, before Marx integrated it into his system (english classical economics + French socialism + German Philosophy/Hegelianism = Marxism). Its why conservatives in the romantic movement described political economy as "the dismal science" because every economist was suggesting that, frankly, "we're all doomed".
Although, since economics is now a useful ideology for the ruling class, and their sympathisers in other classes, no one talks about that. Instead they choose to discuss neo-Malthusianism, ie if there were only less people, or gold standards or the internal sabotage wrought by bankers (if they even discuss that) other balls which might forestall the whole contradictions bringing about a catastrophe. Its rationalising rather than rational.
The whole appeal of libertarianism, to the economically ignorant, is absolutely feeling based, its packed tightly with weapons grade emoting. I can understand it though, its a hell of a fantasy, I do the lottery myself, getting rich and not having to deal with bosses bullshit is something I dream about sometimes too, I dont depend on it though.