My source for "1." is a lifelong friend and "A" at Southwest
2. Should the Southwest Airlines Board of Directors take action to terminate the Plan, this Agreement will be reopened for the limited purpose of negotiating a plan to replace the Profit Sharing Plan.
and for "2" a post to the SWAPA message boards (lengthy and I didn't have permission to copy) comparing Delta PS to Southwest PS.
5. The Company will maintain a tax-deferred "415-Excess Plan," Under the 415-Excess Plan, the Company will allow up to fifty million dollars ($50 million) in Employee contributions to be placed in a tax-deferred rabbi trust, with investment elections.