I am personally don't think that Leave offers the solution to immigration because its not something that can be controlled by any of the measures that have been proposed.
(In/Out of the EU isn't just about immigration though)
Its not that I am not concerned about issues associated with increasing population and planning. I am.
I do think its a global problem that requires a global solution and working together to tackle things like corruption, investment outside our own country, encouraging political stability etc etc.
Whether the EU is a vehicle that can help bring that international consensus and solution is quite another matter. (And is more relevant to the IN/OUT debate about migration - and must not be confused with 'border intergrity' and free movement)
I just don't believe in the drawbridge / visa method as that's not solving the underlying PUSH / PULL factors. Its not really a solution. At best, its a pebble kicking down the road exercise to a much bigger problem.
I certainly don't think encouraging a Them and Us climate where UK interests are separate to the interests of other European nations is a healthy one though. We SHARE the same concerns about increasing populations, and I don't think being an island nation makes us immune or any more able to stop or control migration in a genuinely meaningful way or to a level that 'is manageable' than Germany, The Netherlands, France, Spain, Greece or anywhere else.
The issue, are and will continue to be the same. Global population, inequality and political unrest.
It won't change anything in the medium to long term.
Controlling our borders may work for a while (I personally think it will be an exercise in spending a lot of time, money and effort and will have very little impact on numbers), but at best it will only have a limited time, short term solution, it is effective. IF it works at all. And that's a rather big and questionable IF.
I'd rather start to try and tackle the actual problems, rather than continuing to fail to acknowledge what's driving migration to us, as much as being rather arrogant about it and only focusing on what's pulling migration in.
I've not ONCE heard a Leaver who talks about migration control talk about options to encourage and support people to stay where they currently are. Its all about 'keeping out', 'them and us' and generally seeing it as a problem for the UK only. Indeed, 'foreign aid' is a dirty phrase and something Leave want to stop. The excuse then becomes, corruption. And that's all it is, an excuse. It IS a problem. But that's just it. Another problem that needs a solution. The question merely shifts to how you fix that too.
We don't live in a vacuum. The Leave argument and proposal on immigration, rest entirely on the idea that we do.