[yummyfajitas]

Private companies are legally obligated to fund defined-benefit pensions. There are some waivers given out, but it is generally required.

http://thomas.loc.gov/cgi-bin/bdquery/z?d109:HR00004:@@@L&#3...;

Though strangely, defined benefit non-pension plans (e.g., retiree health care) are not required to funded. That's a loophole which should definitely be closed.

You are correct that the private sector has abandoned pensions for defined-contribution retirement plans, and with good reason. The public sector should do the same.

[quinnchr]

"The PPA increases the funding target for single-employer defined benefit pension plans from 90 percent to 100 percent of the plan’s present value of all accrued benefit liabilities"

Cool, now just make them fund the next 75 years of expected liability, instead of just the current liability.

[Danieru]

They already do, that is what "present value of all accrued benefit liabilities" means.