Catch-allism

This tendency may enhance an electoral strategy of parties which is often called catch-allism: parties seek to accomplish a wide electoral appeal aimed at vote maximization.

Source: wiktionary

Not all of these are wholly independent of the parties, of course, in that at least some of the ostensibly external shocks that have impacted on parties in recent years have their origin in the initial shift towards catch-allism.

Source: wiktionary

I have argued above that with catch-allism and the restriction of policy scopes many of these aspects have become more vulnerable in most European parties.

Source: wiktionary