Their entire justification for their philososphy, most humans cannot be trusted as individuals and therefore must be ruled by 'collectives' or 'central control', has the inherent flaw you pointed out. If humans cannot be trusted as individuals, they certainly cannot be entrusted with complete control of a large central government.
The truth of course is that many humans can be trusted and we only need some controlling legal authority for the few who cannot. The leftist position however must always deny the inherent flaw that is possesses. For if they admit that they have been wrong, then they prove that THEY cannot be entrusted with the power of central government control. This is mainly why I have given up debating the left. They never quickly admit they were wrong and if they ever do agree with the correct position, it takes them years of denial to eventually get there.
Well life is short, and as Reagan said, its time to 'transcend' them.
The current leftist position also has another inherent flaw. They feel the need to accuse the right or 'far right' of doing the 'evil deeds' that they actually are doing. Thus the decades long harping of radical 'right' cabals working out of control within the CIA was actually done to cover up the radical "left' cabals that were secretly operating within the CIA. These were the ones that may have assisted in the Oklahoma City Bombing. Also note how leftist have been harping about members within our government that 'knew' 911 was going to occur. Might guess is that if there were people within our govenrment who knew 911 was going to occur, they were probably contributing members of the Unholy Alliance. Marxist Cabals operating within our own government.