The top 1% of Americans are avoiding paying an estimated $163 billion in taxes a year, according to the Treasury Department. That is pushing the estimated tax gap, the amount of money owed by taxpayers that isn't collected, to nearly around $600 billion annually, and to approximately $7 trillion in lost revenue over the next decade, the Treasury Department finds. Tax evasion is concentrated among the wealthy in part because high-income taxpayers are able to employ experts who can better shield them from reporting their true incomes. More complicated incomes such as partnerships and proprietorships more frequent among high earners " have a far greater noncompliance rate that can hit as high as 55%. "The tax gap can be a major source of inequity. Today's tax code contains two sets of rules: one for regular wage and salary workers who report virtually all the income they earn; and another for wealthy taxpayers, who are often able to avoid a large share of the taxes they owe," wrote Treasury Deputy Assistant Secretary for Economic Policy Natasha Sarin. The IRS is unable to collect about 15% of taxes owed and the lack of resources has led to a fall in audit rates. For the IRS to appropriately enforce tax laws against high earners and large corporations, it would need money to hire and train agents who can examine thousands of pages of sophisticated tax filings. The Biden administration is pushing to raise the IRS budget by $80 billion over 10 years to help increase enforcement, IT and taxpayer services.