But in your view, there is no number that would be "massive" for a country of 70 million - is that right?
This is - correct me if I’m wrong - the third time in this thread you have tried to rephrase my words to mean something I didn’t say. You could just make up an opinion and argue with that and leave me out of it if you wanted, you know.
Are you asking me “is no number that would be ‘massive’ for a country of 70 million?”? If so, then that is a question without context.
If you are asking me to write an essay on “there is no number that would be ‘massive’ for a country of 70 million. Discuss”, then that’s a different proposition and one that might take some time.
However, much of it has been touched on. As you will know, most migration takes place in the “developing world”. What usually happens is people flee from a disaster or war stricken country to a neighbouring country, and no further. That’s by far the most common form of migration. This happens quickly and on a far greater scale than the UK faces now or has ever faced. In these circumstances, of course local infrastructures can be - and are - overwhelmed. That is not happening in the UK, nor is it under threat of happening. It didn’t even happen when France (a neighbouring country to the UK) was invaded during WWII.
Is there a point a which the UK, if it was trying to produce enough food on its own to feed its population without imports, could no longer do so? Possibly, but it’s not been tried, and it’s not what happens now. I think these islands should think harder about food production and food security. But it doesn’t.
The thing is, there is certainly not the political will to welcome actual large scale immigration to the UK. So clearly there’d be no effort to make it work if it happened.
Scotland is different in that the Scottish government has decided that immigration
is the answer to a declining birth rate. This could be seen as virtuous, but it really isn’t, it’s just pragmatic. Within their own neoliberal framework, it’s a short term fix to the aging population. Bring in more taxpayers to increase the tax take to pay for the services used by today’s older people (because
their tax was used to pay for the services for pensioners in their day; it wasn’t saved for by government fir use for that cohort’s retirement). The ScotGov policy of encouraging immigration in itself does nothing to address what happens once the current taxpayers (including today’s immigrants) become old, if they do not produce the required number of taxable children. So successive governments just kick cans down the road rather than actually working towards a better society.
Is there a population density in terms of heads per meter that can’t be exceeded? So far, if the infrastructure is in place, that has not occurred. But it does raise the question of food production again. Cities do need to be serviced by agricultural land.
It could be that in the not so distant future that global environmental catastrophe might mean vast chunks of the planet can no longer support human habitation. In which case we’ll have to redistribute the available resources - including land. There is obviously theoretically a point beyond which that would no longer work, and intolerable suffering and our possible extinction as a species might occur. But that again is another question.