I know nothing
It shows.
Immigrants work and pay taxes, lots of facts, figures and studies show this. It is exactly why left parties loudly argue this, because it is true.
There may be a lot of good reasons to stop mass immigration, or immigration from certain areas or cultures, them costing the taxpayer is not one of those reasons though.
It's not just the left that argue for this. Business does too. CBI etc
Re: "Business", and "CBI" arguing for this - well, they would, wouldn't they? It's common sense, after all.
http://www.bbc.co.uk/news/business-24983178
Yes - I know this is "big business" - but the same holds for many "bosses".
They are in business to make money. They make money by maximising revenue, while minimising cost. Why pay you £15 per hour, when they can get someone to do it for £8 p/h?
No wonder "Business" and the CBI are for immigration.