The above is yet another idiot mantra of the leftwing.

In some parliamentary democracies, a number of parties will be elected due to proportional representation. One of the things this can cause is unstable government - eg Italy's 50 governments in 50 years. In multi-party legislatures, compromnise is effected between parties. In the two party system, the compromise happens inside the broadly-representative two parties. Six of one, half a dozen of the other.
This is a fake issue (yawwwwwwwwwwwwwwwwwn :sleep