You are looking at a very narrow description of a ponzi scheme. if you want to stick to the textbook definition, then no DB plan is a ponzi scheme.
Actually, it was the
dictionary, not a textbook, and yes, I think using the commonly-accepted meanings of words is better than Humpty Dumpty's method. (“When I use a word,” Humpty Dumpty said, in a rather a scornful tone, “it means just what I choose it to mean—neither more nor less.”
from Through the Looking-Glass, by Lewis Carroll) If you use your own definitions instead, it's going to be difficult for the rest of us to understand what you mean and respond appropriately, to what you are actually saying. For example, if you'd stuck to the dictionary, I wouldn't have mistakenly thought you were suggesting that all DBPs engage in criminal conspiracy to cheat employees and retirees out of their money.
However, no DB plan also exists sole on the money that is invested. (snip)
That may be an accurate picture of the current condition of the average pension fund, but it's not so at all times for all funds. I have been keeping an eye on the state of the Seattle pension fund for some time now. It was at the 100% funding level in 2007, and before that, in or around 2001. I'm sure Seattle's is not the only DBP plan that has ever reached the full funding level. There may even be some well managed plans that are there now.
So.... since the plan requires state money(money from state taxes) and School District money(money from local taxes), essentially they are using money from people who are working right now to pay the retirement benefits of people who are retired now.
In a ponzi scheme its similar. You use money that you get from investors right now, to pay for the benefits of people who have money in your fund, to prop it up. Whenever money is used to pay for benefits, and that money comes from people in the same real time, then in my opinion is kind of ponzi like. Its not a strict definition. (snip)
Hsiaochu
I think I now see the parallel you are drawing between a pension plan and a ponzi scheme, although IMO it's clearer to describe a plan in that condition as "underfunded" than "ponzi-like". It's an undesirable state of affairs to be sure, but I don't think that it will inevitably result in the plan going broke. If there is more coming in from all sources—investment earnings, employee contributions, and employer match—than is being paid out in benefits, the excess will accumulate in the fund, which will eventually (one hopes) get back to the 100% level.