Sanders is a dupe - he believes the socialist propaganda. Clinton and the other masterminds of the American Left have no such delusions. They don't believe in socialism. They believe only in power, and they have mastered the art of political maneuvering to obtain it.
As a reminder, here's a part of Tocqueville's prediction of how tyranny will be established in America:
I seek to trace the novel features under which despotism may appear in the world. The first thing that strikes the observation is an innumerable multitude of men, all equal and alike, incessantly endeavoring to procure the petty and paltry pleasures with which they glut their lives. Each of them, living apart, is as a stranger to the fate of all the rest; his children and his private friends constitute to him the whole of mankind. As for the rest of his fellow citizens, he is close to them, but he does not see them; he touches them, but he does not feel them; he exists only in himself and for himself alone; and if his kindred still remain to him, he may be said at any rate to have lost his country...
Above this race of men stands an immense and tutelary power, which takes upon itself alone to secure their gratifications and to watch over their fate. That power is absolute, minute, regular, provident, and mild. It would be like the authority of a parent, if, like that authority, its object was to prepare men for manhood; but it seeks, on the contrary, to keep them in perpetual childhood; it is well content that the people should rejoice, provided they think of nothing but rejoicing. For their happiness such a government labors; but it chooses to be the sole agent and the only arbiter of that happiness; it provides for their security, foresees and supplies their necessities, facilitates their pleasures, manages their principal concerns, directs their industry, regulates the descent of property, and subdivides their inheritances; what remains, but to spare them all the care of thinking and all the trouble of living? Thus it every day renders the exercise of the free agency of man less useful and less frequent; it circumscribes the will within a narrower range and gradually robs a man of all the uses of himself. The principle of equality has prepared men for these things; it has predisposed men to endure them and often to look on them as benefits...
They devise a sole, tutelary, and all-powerful form of government, but elected by the people. They combine the principle of centralization and that of popular sovereignty; this gives [men] a respite; they console themselves for being in tutelage by the reflection that they have chosen their own guardians...By this system the people shake off their state of dependence just long enough to select their master and then relapse into it again...
Subjection in minor affairs breaks out every day and is felt by the whole community indiscriminately. It does not drive men to resistance, but it crosses them at every turn, till they are led to surrender the exercise of their own will. Thus their spirit is gradually broken and their character enervated...It is in vain to summon a people who have been rendered so dependent on the central power to choose from time to time the representatives of that power; this rare and brief exercise of their free choice, however important it may be, will not prevent them from gradually losing the faculties of thinking, feeling, and acting for themselves, and thus gradually falling below the level of humanity.
We are this close to the full realization of his nightmare prophecy.