Traditionally it has been very hard to force the will of the few onto the many, without at least having some of those many taking part in the game. There are technologies with the potential to massively alter that equation.
If you develop such a technology like this one you can be sure it might be used precisely for this purpose: powerful men now need fewer poor men to stay in power.
Maybe it is me living in Germany, but the imagination how the Nazis would have put to use the technology we are currently developing makes me shiver. Many of us create technology as if our democracies are built forever. And they are — until they are not. Or they are not — but not where we live, so we don't care.
I get, that it is hard to find any technology that couldn't in some way be abused in a horrendous fashion by the next authotarian society — however there certainly is a gradient there. And we decide where we feel comfortable to put ourselves.