1976 Campaign staff, Bob Dole's vice-presidential campaign
1981–1985 General Counsel for the Department of the Treasury, under Don Regan. Early in his tenure he supervised the preparation of the report on the Secret Service and the Reagan assassination attempt in 1981. He was important in developing Reagan administration proposals to deregulate financial services that, with some changes, became law in 1999. Wallison recounts that he counseled against the Reagan administration's decision to oppose the Fourth Circuit Court of Appeals ruling that the Carter administration's Internal Revenue Service revocation of Bob Jones University's tax exempt status because its prohibition against inter-racial dating by students violated public policy. Even if the IRS had determined policy, beyond its authority in deciding, opposing this case would be politically foolish. In the event he was recalled to the United States from a banking conference to be present for the Treasury's announcement; when he arrived he found that his seniors were all absent and he was required to announce this choice. Treasury and Department of Justice had worked this out between themselves, and White House staff were furious. A political firestorm followed, and efforts to mitigate it were unsuccessful. .
1999–present American Enterprise Institute, codirector of AEI's financial markets deregulation project.
Other
In 1999, Wallison told New York Times reporter Steven A. Holmes that the expansion of mortgage loans by reducing the amount borrowers have to put down and extending loans to so-called subprime borrowers was creating a situation where Fannie Mae was taking on significantly more risk. "From the perspective of many people, including me, this is another thrift industry growing up around us," he said. "If they fail, the government will have to step up and bail them out the way it stepped up and bailed out the thrift industry." The article pointed out that the Clinton Administration had put pressure on Fannie Mae to lower standards "to expand loans among low and moderate income people." Wallison gave a eulogy at a memorial service for Don Regan in June 2003. Wallison's writing on the cause of the Financial crisis of 2007–08 have brought much comment. In December, 2011, the New York Times financial columnist Joe Nocera stated that Wallison had "almost single-handedly created the myth that Fannie Mae and Freddie Mac caused the financial crisis." Calling it "a big lie," Nocera suggested that Wallison had engaged in a deliberate deception. Economist Paul Krugman has also accused Wallison of deception, criticizing him for—among other things—attacking Fannie and Freddie in a magazine article just a year before the subprime mortgage collapse for not doing a "better job of providing affordable home financing to a neglected portion of the mortgage market." This neglected portion consisted of "African-American... Hispanic", and "low-income borrowers". Wallison cites New York Times columnist Gretchen Morgenson exposing how "Democratic political operative Jim Johnson turned Fannie Mae into a political machine", and dismisses the exoneration of the GSEs as "the big lie."
Member and dissenter on Financial Crisis Inquiry Commission
Writings
The State Banking Revolution and the Federal Response: New Frontiers of Financial Service Expansion, Law and Business/Harcourt Brace Jovanovich, 1984.
State Banking Regulation and Deregulation, Law and Business/Harcourt Brace Jovanovich, 1985.
Back from the Brink: A Practical Plan for Privatizing Deposit Insurance and Strengthening Our Banks and Thrifts, AEI Press, 1990.
Nationalizing Mortgage Risk: The Growth of Fannie Mae and Freddie Mac, AEI Press, 2000.
The GAAP Gap, AEI Press, 2000.
Optional Federal Chartering and Regulation of Insurance Companies, AEI Press, 2000.
Fannie Mae and Freddie Mac: Public Purposes and Private Interests, Volume 1: Government Subsidy and Conflicting Missions, Volume 2: Prospects for Controlling Growth and Expansion, AEI Press, 2000, ,
Serving Two Masters, Yet out of Control: Fannie Mae and Freddie Mac, AEI Press, 2001,
2 volumes of papers delivered at a conference on March 24, 1999 at the American Enterprise Institute, Washington, D.C.
Competitive Equity: A Better Way to Organize Mutual Funds.
Contributor to periodicals, including the Wall Street Journal, New York Times, and Washington Post.
Hidden in Plain Sight: What Really Caused the World's Worst Financial Crisis and Why It Could Happen Again, 432 pages; ;
