The Featured Article seems to address something more general than that. In the Netherlands, we have a nearly perfectly proportional system and somewhere around

The Featured Article seems to address something more general than that. In the Netherlands, we have a nearly perfectly proportional system and somewhere around 13 parties in parliament at the moment, but the beige dictatorship and the general failure mode of representational democracy is similar, with the moderate parties (the old left and right parties) becoming more similar every election cycle, and voters fleeing to the extreme left and right. I mean, disrupting the duopoly is very necessary, but after that you're not there yet.