The destroyer of all and or any economic systems is always wealth inequality. When the majority of humans participating in an economic system do not have enough currency to spend within that economic system to give them a comfortable lifestyle, because a small minority are holding most of the currency that was created in that economic system, that system will eventually fail. Sometimes it fails because of inflation ( if more new currency keeps being created instead of the currency leaving the wealthy minority and going to the poor majority) and sometimes it fails because of revolution, simply because the majority get tired of being poor...