The principle of permanently increasing the minimum wage in line with CPI will force the market to permanently adjust to accommodate all wages as a result.
The reality is, with a zero net growth economy and creating money without debt, there is no reason the CPI should be guaranteed to rise annually at all.
This must be enshrined in law as deeply as possible. Award wages cannot drop without significant intervention by the government to the same kind of level required by constitutional change.
Executive contracts negotiated on an individual basis should not be protected by this guarantee, the executives can negotiate their own terms. The majority of the population should be protected by award agreements.