You and your employer should consider future expected inflation at the time of negotiation. You don't need a true up in that case to "break even!.

mrtksn 2 hours ago | parent | next [-]

IRL most of the time there's no negotiation, you find out your updated salary when the money hits the bank.

	▲	NewJazz 2 hours ago \| parent [-]
		At initial employment there is salary negotiation. Each COLA then automatically inherits whatever assumptions were baked into the starting number.

And hopefully the other candidates applying for the position have similar inflation expectations to your own!