Or perhaps they think that if they do explain their plans, no one will believe them – since Tories, even after Cameron, are pigeonholed as market-obsessed, individualist centralists (with some justification, given their past).
For good reasons it had long been a British centralist party, with an intense dislike of Celtic nationalism or separatism.
This was organised on a democratic centralist basis, with component parties required to fight for policies adopted by the body as a whole.
Pujol understood that under a centralist Spanish state, with 37% of the Catalan population being Spanish immigrant, he would need to help the new population identify as Catalan.
After the experience of Spanish centralist dictatorship, and with the world crisis advancing, Catalan political leadership transferred to more radical and republican forces.
Such centralist measures met with the opposition of not only the conservative cantons but also the francophone minority; together they managed to defeat a first draft for an amended constitution in 1872.
"I'm just fed up with Madrid, this centralist government, always mistreating us, financially, economically, culturally," she says.
Even so, this centralist tendency is often at odds with another long-standing theme of the French nation: the insistence on the supremacy of the individual.
Such evidence, alongside Convergència's strong links with centralist-minded big business, should encourage progressives to drive a wedge between Mas and the movement.
The religiously minded, centralist Shia disagree on several big issues with the more secular, federalist Kurds.
