The bosses already hate their workers and are mad that they have to pay them a cent. Would they really accept paying another 10% on their wages to make their workers 10% more productive? When there is significant active competition between the providers of core models and huge pressure to reduce prices?
In the US, since the 1970s virtually all technologically-driven productivity gains have been captured by the top 10% (who own 90% of all public equity). (See, e.g., https://www.epi.org/productivity-pay-gap/ .)
So no, little or none of the AI productivity gains will go to workers, barring significant changes in public policy like universal basic income and the massive tax increases necessary to implement it.