Instead of 50% make the retail discount permanently 52% and make it after sales taxes as well. The extra 2% covers letting commercial agents inflate 2% per annum before taxing any higher rate of inflation at 100%, and of course the discount is indexed to any higher rate of inflation as well.

The discount including state and local sales taxes benefits them because the monetary authority thus pays for and collects 52% of their taxes for them thus inviting their self interested support of the new paradigm project.