Former Wyoming Senator Alan Simpson, the co-chairman of President Obama’s deficit commission, has sparked calls for his resignation after sending an offensive and sexist note to Ashley Carson, the executive director of the Older Women’s League. While such calls are reasonable — Simpson’s comments were certainly more offensive than remarks that led to the resignation of other people from the Obama administration — the Senator’s determined ignorance about the basic facts on Social Security is an even more important reason for him to leave his position.

I was also a recipient of one of Simpson’s tirades. As was the case with the note he sent to Carson, Simpson attached a presentation prepared for the commission by Social Security’s chief actuary. Simpson implied that this presentation had some especially eye-opening information that would lead Carson and myself to give up our wrong-headed views on Social Security.

While I opened the presentation with great expectations, I quickly discovered there was nothing in the presentation that would not already be known to anyone familiar with the annual Social Security trustees’ report. The presentation showed a program that is currently in solid financial shape, but somewhere in the next three decades will face a shortfall due to an upward redistribution of wage income, increasing life expectancy, and slow growth in the size of the workforce. The projected shortfall is not larger than what the program has faced at prior points in its history, most notably in 1982 when the Greenspan Commission was established to restore the program’s solvency.

It was disturbing to see that Simpson seemed surprised by what should have been old hat to anyone familiar with the policy debate on Social Security. After all, he had been a leading participant in these debates in his years in the Senate.

Simpson’s public remarks also seem to show very little knowledge of the financial situation of the elderly or near elderly. He has repeatedly made references to retirees driving up to their gated communities in their Lexuses. While this description may apply to Simpson’s friends, it applies to very few other retirees, the vast majority of whom rely on Social Security for the bulk of their income. Cutting the benefits of the small group of genuinely affluent elderly would make almost no difference in the finances of the program.

Furthermore, the baby-boom generation that is nearing retirement has seen most of its savings destroyed by the collapse of the housing bubble that both wiped out their housing equity and took a big chunk of the limited money they were able to put aside in their 401(k)s. Simpson shows no understanding of this fact as he prepares to cut benefits for near retirees.

He also doesn’t seem to have a clue as to the type of work that most older people are doing. While it is possible for senators to continue in their jobs late in life, nearly half of older workers have jobs that are either physically demanding or require they work in difficult conditions. Simpson seems totally clueless on this point when he considers proposals to raise the retirement age.

The key facts on Social Security are not hard to understand. The shortfall is relatively minor and distant. Most retirees have little income other than their Social Security, and most workers would find it quite difficult to stay at their jobs in their late 60s or even 70. We might have hoped that Senator Simpson understood these facts at the time when he was appointed to the commission, but we should at least expect that he would learn them on the job.

His determined ignorance in the face of the facts is the most important reason why he is not qualified to serve on President Obama’s commission. Someone who is co-chairman of such an important group should be able to critically evaluate information, not just insult and demean his critics.

Dean Baker is co-director of the Center for Economic and Policy Research in Washington, D.C. He is the author of several books, including False Profits: Recovering from the Bubble Economy.