My grocery prices consistently creep up with my income. The retailers accomplish this by presenting me with a trade off between price and quality/convenience. In other words, they extract more money from my by giving me more value in return. I don't see why that can't continue to work. If they start fucking around with weird pricing schemes instead, that destroys the tradeoff and with it my incentive to continue giving them more money.
No, I mean that I tend to buy those more expensive items more often now, because they offer additional quality or convenience which is now worthwhile to me. I also tend to shop at more expensive stores, since they tend to have better stuff and be closer to me.
