I hate to say this, because it sounds like a tautology but it isn't.  One of the primary electoral concerns in neo-liberalism, a cornerstone of its thought, is limited government.  If you are worried about a demagogue executive being too strong, the primary culprit is that your government has too much power and authority to begin with.  Revert it to the people, through property rights, gun rights, the right to petition, the right to a free press, a government of enumerated powers that are concentrated at the local level, etc., etc.  No one really cares about a demagogic Cub Scout leader, now do they?

Then read the rest of the Federalist Papers on how to achieve other sensible electoral reforms.  It's still the best blue print out there.