Emphasis on it is cynical, although it would be irrational not to include it in the debate at all.
Do you think the current immigration level is too high?
Define 'too high'. Please don't use future predictions of apocalypse as your definition because we've had these type of predictions for the last 40/50/60 years, and it's not happened yet.
Additionally these previously apocalyptic immigration level predictions were aimed at non-EU immigrants. Quite convenient for these same predictions to now be aimed solely at EU migrants. Don't you think? Even more cynical for those same Brexiters to argue that any shortfall in EU skilled workforce could be made up from Commonwealth skilled immigrants. Perhaps countries that can ill afford to lose those skilled workers.
As I said earlier, in another comment, if we prevent the EU workers from coming to work in UK, how are we going to replace those workers?
We already know and recognise that the non-EU migration levels will not be affected by Brexit, that's 184,000 net migrants p.a. who will continue unabated.
Additionally, the 120,000 p.a. (64% of 188,000) EU workers (net migrants because we can assume that a similar process of UK emigration occurs.)(young, fit, healthy, tax-paying people) will be replaced by the UK emigres who no longer have the freedom to live or work in EU. These are probably the older, less healthy, non-tax paying (except on their pension) type of people who will place greater demand on public services.
We can assume that the other 35% of EU migration will not be affected. We wouldn't want to stop the students, or maybe we couldn't stop those coming to join others (ECHR which we will still recognise and nothing to do with EU) So that's about 70,000 p.a. net migration who will still have reasonably free access to UK.
So assuming we prevent the 120,000 EU workers and accept the fact that our public services (as far as health and welfare is concerned) will take a hit, that's still 250,000 p.a. net migration even after Brexit, (184,000 non-EU and 70,000 EU others). That's also assuming that the EU workers are not replaced at all.
Moreover, how many EU migrants are stuck in 'the jungle' in Calais?
How many illegal EU migrants currently evading Border Agency in UK?
How many EU illegal migrants currently trying to cross to UK?
Zilch, rien, nowt! They don't need to! They have free access currently.
That means that the Border Agency problems are only and uniquely with non-EU immigrants. In the case of Brexit the Border Agencies work will double as far as people are concerned, and new borders will be created.
UK citizens will be denied freedom to live or work in EU! The current expats health care could be curtailed. Pension payments could be affected.
And all for a cynical argument for Brexit! An argument that is full of emotion against immigration and empty of economic, social, educational, and personal sovereignty benefits.