No, it's a failure mode of first past the post election systems. Politicians are incentivized to join one of the first two parties, and voters are incentivized

No, it's a failure mode of first past the post election systems. Politicians are incentivized to join one of the first two parties, and voters are incentivized to vote for them. This is not a failure of democracy. It's a failure to teach people about voting systems and game theory. Proportional representation is the solution to this, so that new ideas can enter government incrementally instead of only when they get the majority vote, by which time it's probably too late. But this is really hard to get through people's heads, because it is very hard to get someone to understand something, when their influence and power depends on not understanding it.