i think, as the article illustrates, the parties all say that they’re for reduced immigration. Say is a bit different from actually being for it. Much like our Dems and too many pubbies, what they say about immigration and what they believe is quite different. To many it’s simply a numbers game and a perpetuation of their positions of power.
Hence the rise of UKIP. The UK’s major parties have failed to deliver on their promises. But it is important to note that the major parties have been forced into at least saying they are for reduced immigration because they understand that it is politically advantageous to say so. We have not reached that stage in the US.