This would be an extremely regressive tax regime, effectively a flat tax rate. Worse than a flat tax rate, actually, since consumption rates do not scale linearly with income or wealth.

I think he meant that you'd have the brackets apply to types of consumption instead of income level, so no tax on food, low tax on restaurants, medium tax on high-end electronics, insane tax on planes and yachts. I mean it sounds like it would be easier to maintain/enforce such tiering system than constantly fight with people trying to not technically be wealthy. Downside of course is that some people's luxuries are other's basic needs, but I wonder if there's been serious research on the implications of such system.