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The latter figure is the shortfall between the tax and national insurance the 3.6 million migrants and their jobs deliver, and the £10,500 p.a. average cost of public services
Bullshit. EU immigrant are contributing more in taxes/NIC than the average UK population atm.
The other areas on "UK -may- have to pay out on Eurozone debt" sounds like a "needs more info"
But, assuming it -does- cost a billion a day it then has to be offset by the costs of leaving on whatever deal they assume.
https://globalbritain.co.uk/new-brexit-paper-puts-the-real-cost-of-eu-at-nearly-one-billion-a-day/