Democrats are not ruling out raising taxes for the wealthiest people to help pay for tax cuts for middle-income families, House Speaker Nancy Pelosi said. She spoke of pursuing an estimated $300 billion that people owe in back taxes, eliminating deficit spending and reducing wasteful federal spending. "As we review what we get from ... collecting our taxes and reducing waste, fraud and abuse, investing in education and in initiatives which will bring money into the Treasury, it may be that (repealing) tax cuts for those making over a certain amount of money, $500,000 a year, might be more important to the American people than ignoring the educational and health needs of America's children," Pelosi, D-California, said in an interview aired Sunday. (Interactive: What House Democrats pledge to pass in the first 100 legislative hours)A budget rule, known as the pay-as-you-go rule, that was approved by the Democratic-run House on Friday requires that tax cuts have corresponding cuts in government spending or tax increases elsewhere to pay for them.