The "low benefits" are in respect to mid and upper level managers that are currently recieving much higher pension promises. The number may go lower as more company pension plans evaporate and the load on the system increases. This will potentially drive that maximum number down to where it will start hurting the blue collar and lower level white collar worker.
So all in all, the next 15 to 20 years will see social security and PBGC either tank or cause extrodinary (and conficatory) increases in federal payroll taxes.
Who pays the 'premium' on a transfered pension? What happened to the prorata share of the pension fund due the employee?