Well, they're not, anyway.
Protestant evangelicals and Anglicans in Britain have today launched a campaign to show that Christianity, the person of Christ, is not merely the solution for our personal lives, but for the nation.
The Church (the real Church, that is,) used to have a specific doctrine about this.
It's called "the social reign of Christ the King". One of those retrograde pre-Vatican II popes even instituted a feast day, the Feast of Christ the King, to try to get people to remember this. This doctrine is probably the most significant point of departure between Catholics (particularly American Catholics) who identify themselves as "conservatives" and us. Trads are usually Trads not because of the old Mass. They're Trads because they believe that democracy isn't going to work until it is under the reign of Christ (if then). We are believers in the Catholic confessional state.
And when we start talking about it, you can see the neo-cons just starting to burst...that faint popping sound you hear...
Certainly the doctrine of the social reign of Christ is one that most Catholics, and nearly all Churchmen, (yes, right up to the very top) are deeply ashamed of. But it is interesting that this group of prots has just figured it out, all by themselves. Just through the use of reason.
So maybe it is not much of a wonder that there doesn't seem to be a signficiant Catholic contingent in this campaign.
I wonder how many of the Catholic bishops of England and Wales have signed on for the Not Ashamed campaign.