that "on average about 3% of personal taxes are evaded in Scandinavia, but this figure rises to about 30% in the top 0.01% of the wealth distribution... Taking tax evasion into account increases the rise in inequality seen in tax data since the 1970s markedly, highlighting the need to move beyond tax data to capture income and wealth at the top, even in countries where tax compliance is generally high. We also find that after reducing tax evasion—by using tax amnesties—tax evaders do not legally avoid taxes more. This result suggests that fighting tax evasion can be an effective way to collect more tax revenue from the ultra-wealthy." United Kingdom HMRC, the UK tax collection agency, estimated that in the tax year 2016–17, pure tax evasion (i.e. not including things like hidden economy or criminal activity) cost the government £5.3 billion. This compared to a wider tax gap (the difference between the amount of tax that should, in theory, be collected by HMRC, against what is actually collected) of £33 billion in the same year, an amount that represented 5.7% of liabilities. At the same time, tax avoidance was estimated at £1.7 billion (this does not include international tax arrangements that cannot be challenged under the UK law, including some forms of base erosion and profit shifting (BEPS)). In 2013, the Coalition government announced a crackdown on economic crime. It created a new criminal offence for aiding tax evasion and removed the requirement for tax investigation authorities to prove "intent to evade tax" to prosecute offenders. In 2015, Chancellor George Osborne promised to collect £5bn by "waging war" on tax evaders by announcing new powers for HMRC to target people with offshore bank accounts. The number of people prosecuted for tax evasion doubled in 2014/15 from the year before to 1,258. United States In the United States of America, Federal tax evasion is defined as the purposeful, illegal attempt to evade the assessment or the payment of a tax imposed by federal law. Conviction of tax evasion may result in fines and imprisonment. The Internal Revenue Service (IRS) has identified small businesses and sole proprietors as the largest contributors to the tax gap between what Americans owe in federal taxes and what the federal government receives. Small businesses and sole proprietorships contribute to the tax gap because there are few ways for the government to know about skimming or non-reporting