From Plato's "Republic"
"A democracy is always temporary in nature; it simply cannot exist as a
permanent form of government. A democracy will continue to exist up until
the time that voters discover they can vote themselves generous gifts from
the public treasury. From that moment on, the majority always votes for
the candidates who promise the most benefits from the public treasury,
with the result that every democracy will finally collapse due to loose
fiscal policy, which is always followed by a dictatorship."