I still believe that you need a minimum of 3 parties for a healthy democracy
Because the US 2 party system has shown us that you take 1 step forward, the the other party comes to power, and does an undo of what the other party achieved.
Once you have 3, you need 2 parties to agree, that filters out the whacko nut job ideas of the extremes, on either side.
And you get moderate ideas coming out
So you may be swinging a little from right to left, but maintaining a forward momentum.
And no I don't mean Ralph NADER