The idea is certainly counterintuitive, but it's a serious proposal from the Committee for a Responsible Federal Budget. This is the group's explanation:
... a Go Big approach [$4 trillion] is not just what is needed to get control of the debt from a policy perspective, a comprehensive approach can also improve the chances of success from three main factors:
• Political Trade-Offs. Putting everything on the table, especially the drivers of future debt, would allow the political trade-offs necessary to tackle entitlement and tax reforms to be considered.
• Shared Sacrifice. A comprehensive approach would promote a sense of shared contributions, improving political support while reducing push-back from constituencies and interest groups who would otherwise feel singled out.
• Economic and Political Gains of Debt Reduction. Stabilizing the debt would boost confidence, strengthen the economy over the longer-term, provide greater certainty and an improved business environment, and
That last point is especially important. Such a comprehensive approach would go a long way to relieve the uncertainty that is currently holding an economic recovery back. I believe there would be an explosion of hiring and growth.