My only concern would be whether it would inhibit sales, and thus depress the economy. It would need a test first so we could see what would happen in a real world scenario before it went national.
Equivalency, OK. Increased purchasing, OK. If it reduces demand (most likely), then we've got a problem. It's an artificial price increase, which is consumer inhibitory. Depends on how consumers view it, and whether the additional cash in their paycheck is sufficient to encourage them to buy despite the higher prices.
Much as I would like to think that consumer mindset is logical, sometimes it just isn't.