Don't agree with this at all. Pricing should never be up to the client and their ability to pay. And also, you will have to keep track of every customer and their individual prices which would be a mess to keep track of.

You have to remember that most industries are very incestuous with people moving between companies within that industry. So what happens if someone from a price-sensitve customer (price A) moves jobs to a price C company and tells the new company the low price that their old price-sensitve company was getting? Price C company will demand that price (as I would) and then you're in trouble.

I make things simple. I charge the same price for everyone with discounts for volume. That's it. Nice and clean.