Maybe, I have never seen such dual prices. Are they state mandated?

I guess im still looking for some limiting principle. Why not just mandate that all goods are sold proportional to income.

What are you so afraid of?

That taken to an extreme, this idea is the same as "from everyone according to their ability, to everyone according to their needs". Which sounds great, until you realize that this incentivizes needs and disincentivizes abilities.

Which really is just a manifestation of "when a metric becomes a target, it ceases to be a useful metric".

There are ways to disentangle the undesirable incentives. The Nordic countries in particular have done a great job of this.

Inability to work and create for my own benefit and that of my family. Collectivization and theft of my labor value.