I honestly can't tell it the was meant sarcastically.
Who defines what the "right" political idea is? And do you really want to live in a society limited only to ideas that are deemed as the "right" ones by whoever has that power?
What do you mean? Who defines the "right" political ideas in a democracy?
My understanding is that a democracy would exist to allow the majority of a society to define what they want, and that in the US we have a democratic republic because our founders still didn't trust the public enough to leave decisions entirely to a majority vote of the public.