Those parties the EU would destroy are first driven into coalition. In Germany the old rivals, CDU and SDP are in grand coalition. It is proving especially stressful for the SDP who now wish to differentiate from the government line in a number of areas. The anti Euro AFD is on the rise, rallying the growing number of voters who think the Euro and the open borders are not policies working in Germany’s interest.
The EU’s interference in law making, budget setting and much else is crushing the traditional parties in many European countries. The collapse of the two main rivals is at its most pronounced in Greece, where the grotesque austerity enforced on the country has removed Pasok as a party of government (Labour like) and badly damaged New Democracy (Conservative like). In both Spain and Ireland the two traditional parties that contend for power received only around than 50% of the vote between them in recent elections, leaving their countries without governments.
In the UK being out of the Euro moderates the impact of the EU somewhat. Even here the vote share of Labour and Conservative together has fallen, but last time there was still a small majority for the Conservatives. However, to get the many EU laws, taxes, budgets and measures through against the opposition of a large number of Eurosceptic Conservative MPs the government has had to rely on Labour and SNP votes, or on their abstention. This reliance is creating tensions within the ruling party and within the opposition.
Now we come to the referendum the same truth underlies the Remain campaign. They can only hope to win if Mr Cameron attracts a majority of Labour and SNP voters to his cause, as many Conservatives are strongly against the EU and its works.
Government coalitions tend to erode confidence and respect for main parties, as the parties have to dump manifesto pledges and compromise principles people thought they held dear. Though many say they would like parties to work together more and find more compromises, in practice the results of that are often perceived as being bad faith and untrustworthiness. This is intensified if the compromises are to accommodate laws and taxes imposed by the EU rather than ones stemming from large bodies of opinion at home.
There are many critics and criticisms of two party choice democracy. I think it the least bad system. The problem with multi party democracy is it can so easily mean weak government or no elected government, more bureaucratic and EU control, and more scorn for parties who are forced to renege on some their most closely held beliefs and cherished policies. The EU is a creating a crisis of government in its large area. Many people now object to EU policy but have no way of changing it, even when they change their own national government in an attempt to do so. It is also fuelling parties that want to split up their nations, encouraged by the Europe of the regions rhetoric and grant regimes.