Are you saying/assuming that increased immigration is desirable then RH ?. You seem to be dead set against reducing it..
As, for once, you've asked a reasonable question, albeit a closed question, I'll respond with a reasonable answer, although you probably won't like the answer. Next time perhaps you could open your mind to consider more open questions.
I'm aware that the situation is far too complex for the likes of you, me and the others on this forum, whatever their persuasion to arrive at a sensible or long-term definitive conclusion. It's certainly far too complex for anyone, such as Farage, with predetermined notions to attempt. He's seen the solutution and now he's looking to justify that solution by 'determining the problem'.
What I am also aware of, is the speed at which immigrants ae blamed for all the ills of society. Probably because they're an easy target. Unfortunately, as already alluded to in previous responses, it's not only the first generation immigrants who are discriminated against. It's often the second, third or subsequent generations that continue to suffer discimination. That serves no other pupose than to alienate some in society. Although, their ability to see beyond that discrimination is testament to their forebearance, patience and fortitude. Unlike those who resort to the discrimination.
I realise that prejudice is taught at home, and is difficult to eradicate later, as the saying by Bertrand Russell suggests.
But this is beside the point. (Although I'm sorely tempted to add, the analogy of corporal punishment).
Soemtimes, increased economic activity can only be fed by migrant labour. To discount that migrant labour is not only to risk reducing the speed or reversing that economic increase, but also having potential other detrimental effects, brought about by increased demand of labour and/or particular skills, over supply. But it's not a simple problem.
Imagine a silly situation, albeit a simple analogy, of a surfeit of skilled labour but a deficit of unskilled labour and no migration allowed. Either there's a massive explosion of robotics, or a silly situation of unskilled wages equalling or increasing beyong skilled wages. The motivation for training and even education is gone.
Sometimes, especially, perhaps in times of economic downturn, it might be desirable to reduce migrant labour but it's not a short-term problem/solution scenario. So it's not possible to effect any changes during that economic downturm and again it's not a simple problem and the undesirable consequences may be prolonged.
Of course some decisions have other effects, e.g. the EU, as did the British Empire, the Commonwealth, the World Wars, etc. Some of these effects are irreversible. The various governments must weigh up the benefits of such decisions, etc. Sometimes some decisions have to be taken irrespective of potential undesirable consequences. I don't believe that limiting/ reducing immigration is one of those decisions that has to be taken irrespecrive of the repercussions. From official reports it's evident that there are benefits to UK from migrant lablour, and this is during a period of economic downturn.
Migrant labour is caused by many, many situations, one of which is the human's natural desire to improve their 'lot'. Just like the old Cecil Rhodes/ Jeffrey Archer saying about birth being the first lottery in life, who has the right to decide that someone does not have the right to try to improve their 'lot' in life. To resort to artifical man-made structures i.e borders, to try to restrict access to resources, etc is probably just as natural as the attempt to improve one's 'lot'. But is that the type of person you aspire to be? You obviously don't wish to live in a meritocracy. I do. And I don't want to place any artificial limits in that meritocracy. But at the same time, I wish to live in a humane meritocracy. I've never heard that expression "humane meritocracy" before, have I just invented it?
To add to the confusion, labour migration is only a part of the equation, there's health, education, crime and safety, politics, climate, and I suspect many other aspects that cause people to want to migrate, temporarily or permanently.
Me, I migrated for the culture, for the slightly better climate, to be able to afford the kind of house and land that I wanted to achieve my dreams. I wanted to be able to do the things that I've always wanted to do. Who am I to deny that right to anyone else?
I appreciate that this post is far too long for some to be able assimilate. My apologies.
Here is my conclusion for those that don't want, or can't read it all:
"No." and here's a picture for you to look at: