The viability of defined benefit plans in the U.S. is questionable. It's a real conundrum.

These numbers illustrate the strength and viability of these companies as investment opportunities.

The conundrum they face is that they know better.

So that makes us robbers of robbers," said Bug, "who pretend to be robbers working for a robber of other robbers.

A defined-benefit Keogh would allow you to sock away a lot more, with the amount you contribute depending on your age and compensation. It makes the most sense for someone older making a significant amount of money.

Freezing a defined benefit plan is only a half-measure that slows the growth of the plan, but does little to alleviate the associated market and mortality risk. It is for this very reason that most senior finance executives are examining a variety of solutions to contain growing pension risks. However, they are dissatisfied with the range of currently available options and, to some extent confused or put off by the competing claims of potential solution providers.