I agree that the Lab Salary should have a Cost-of-Living inflator and go up yearly if the COL does.
However, the Lab was created at the request of Equity Members who did not like working for a lower salary under the Workshop provisions, which also provided participating actors with a small share of the box office gross and profits. The actors were willing to forego those shares form a Workshop and take a higher salary under the :ab agreement. Now they want it both ways. But tough!