Don't you think a reasonable argument exists regarding Scotland having the relevant levers to alter immigration policy and address this very significant point, rather than have this policy directed by somewhere that has a very different set of immigration needs and wants?
Do you really find it preferable to have the strength and comfort of being part of a greater entity in order to deal with the problems this situation brings, rather than actually have the power to do something about it in the first place.
I think this is the strongest pro-independence argument that exists right now.
Also (and I have to say I don't really like this argument), could it be said that Scotland has a diminishing number of tax payers because it is so easy for our talented young Scots to go elsewhere in the UK, particularly London, where job prospects are much better? Stick a dirty great hard border between us and London (but not the rest of the EU) and might we be able to hang onto Scots who currently choose to live and work elsewhere in the UK and pay tax into the coffers of another geographical part of the UK?