Reasonable question, even if I'm not actually the one being paid to work out the answer.
First, I wouldn't blame immigrants for the predicament we find ourselves in. The economy is in this mess primarily because of the downright irresponsibility of the banks, secondly the inability (or unwillingness) of the polititicians we elect to tackle the problems that were becoming self evident years ago and thirdly our "accountants" - always willing to indulge in creative bookeeping in order to keep an otherwise bankrupt company from going under.
Ok. Here is what I would do. On principle I wouldn't spread the jam so thinly that it doesn't make a real difference to anybody. So an across the board VAT cut is in my view a non starter - it gives me about £13 a month extra and what is the use of that ?
If VAT is reduced from 17.5% to 15% then petrol prices will fall by about 2p a litre. I expect that would be good news for hauliers, farmers etc - all those people who have high transport costs. So lets keep that benefit ...
What I would do is cut 2p a litre from fuel duty. A cut of 2.5% in VAT will cost the Government £12.5 billion a year. Take the cost of the fuel duty reduction from that and invest the balance in projects that will make a real impact on unemployment - transport infrastructure, social housing projects, erecting flood defences .... whatever.