A horrible idea, mair, low grade economic immigrants.
"You do realise that this study was a basic input output snapshot and did not take into account immigrants lack of previous contributions to the infrastructure they use (roads, schools, hospitals, housing etc paid for by our parents and grandparents), or the changing impact they are likely to have over time, dont you?"
Right from when I was a baby, my parents had Nigerian, German, Italian and West Indian trainee and qualified doctors, nurses, architects, lawyers and teachers living in our house. That's just from memory.
They were not low grade economic migrants. They were the people that designed and staffed our schools, hospitals and other buildings.
I find your posts very sinister.