The whole tax system needs simplifying and that would go a long way towards closing loopholes. It is so complicated the Revenue and Customs don't even understand it, especially since they got rid of their most senior people as a cost cutting exercise. Btw did you know that their London offices were sold to a company and then rented back on the basis that this would save money. I don't know if it was an economical move but the company in question is incorporated offshore and pays no tax in the UK.
The Republic of Ireland and their tensions with migrants.