Again, I think you're assuming that at the far left of that 'linear' chart people spend solely on scarce goods. Research shows that isn't so. I think the actual

Again, I think you're assuming that at the far left of that 'linear' chart people spend solely on scarce goods. Research shows that isn't so. I think the actual chart would look like a tiny price bump which went mostly flat until some critical amount, well over $12k a year, was reached, at which point we'd see something like what you're describing.