Vendors now cannot get X pounds with Y pounds advertising outlay to make Z pounds per unit of wares. To continue making Z money per unit of wares, with previous S pounds price charged to consumers per unit, add significantly more than reduction in Y advertising per unit to S to offset reduced "brand" "awareness".
No one buying shit anymore. People still buying shit elsewhere. GDP and tax revenues fall relative to others. Deflationary aspects. Market leaders complain through lobbying groups. Repeal. Back to square one.
I don't agree. They are two separate depictions of what might happen as a result of applying a tax on advertising. They may well coincide with each other, however. Saying that the second is a restatement of the first is like saying two interpretations of Piero Manzoni's "Artist's Shit" are restating the same fact.