It really depends upon how much money you have in your account. Having a monthly paycheck come in for the rest of your life is extremely important. So it would probably be smart to put some of your money into an annuity, which is a way of buying a monthly pension check.

The most common mistakes were investing in money market funds by people who were so scared at the prospect of managing their own funds that they picked the most conservative option, and their investments did not keep up with inflation. The second major mistake was being too heavily invested in their own company's stock, and buying when it was high and there was a lot of optimism about the company, and then having to sell it low when the company got in trouble.

If the experts are right in their calculations, then we face the prospect of millions of people retiring into poverty from the American middle class in the years ahead. That has all kinds of social and economic consequences. We need to anticipate those and start tackling the problem in a constructive way.

Social Security is the foundation stone of that kind of retirement security. It not only needs to be strengthened in order to make sure it's there for younger baby boomers and Generations X and Y, but it probably needs to be strengthened and expanded because the retirement benefits now being offered by most employers are not sufficient to support middle-income Americans in their long years of retirement.

In Western Europe, most countries have variations of the lifetime pension system for most workers so they are keeping the system that we are walking away from. By comparison, 50% of the American workforce is not offered any retirement plan by their employers. And of those who are offered a plan, roughly 25% do not choose to join. In other words, everything is voluntary, and that's one of the reasons our results are so perilous for most people.

One of the difficulties in getting to the bottom of the poor prospects for retirement is that the policy and intellectual elites, including corporate leadership, who are dealing with this problem, rarely have the same difficulties as the great majority of middle-income Americans.

The issue of the pension gap has got to become visible and important to millions of people before Washington will respond seriously. Right now, everyone thinks it's his or her own problem and that individuals have to do better and save more. Of course, that is true. We all have to save more and take responsibility for our own retirement. But we have a huge social and economic problem on our hands.