The largest U.S. private-equity funds and venture capital firms have relied on a lobbying campaign to protect the carried interest tax break that has benefited fund managers. The private-equity industry has argued that carried interest should be taxed as investment income rather than wages because it encourages entrepreneurial risk-taking. But starting in 2013, an overhaul enacted by Obama that includes a tax on unearned income will help pay for the expansion of insurance coverage according to www.bloomberg.com.