"We are the most difficult to replace."
Not any more. CX could have you replaced in the blink of an eye. CAD would ensure such a move would proceed easily.
"Most of us are the main breadwinners"
Market forces, that dictate your salary, do not care how much you "need". Such forces will remunerate you based on what you can provide regardless of how little your partner makes. But nice try.
"Fos and Sos are being asked to give away BPP"
Shock horror. Did you think such an absurd thing as BPP would last forever?