The tax gap between what corporations should be paying & what is actually received by exchequer stands at £36bn!! https://www.theguardian.com/business/2017/apr/15/labour-plans-clampdown-on-sweetheart-deals-to-close-36bn-tax-gap …
it really doesn’t . £36bn is the whole tax gap (informal economy etc.) https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/561312/HMRC-measuring-tax-gaps-2016.pdf …