And it's inequality that creates desire - someone wants something they don't have or need more of. Someone else has that thing. Imagine a world where everyone is a millionaire - what then is the value of a loaf of bread? The baker has no motivation to bake the bread - he is a millionaire after all.
I don't believe you. For these reasons.
1. I have plenty of desires, very few of them come from any inequality or any illusion of inequality.
I have a desire to spend time with my kids. What inequality creates that desire?
My kid desired a Lego Castle, where was the inquality that created that?
I have plenty of desires, very few of them come from any inequality or any illusion of inequality.
Any inequality worthy of note would come form a shortage and most shortages come from greed.
Greed would be built from, desire without compasssion.
Sharing comes from desire with compassion.
2. The world is not filling with ipads due to a need.
3. Trade only happens when the seller and the buyer agreed that the exchange is equal in value. So it is equality not inequality is what is needed for trade.
4. What the Baker does when they become a millionare will depend a very great deal on why they were a Baker in the first place. It the main reason was money then they won't continue baking. If the main reason was they enjoy baking and enjoy people enjoying their baking and the money was a secondarly issue, then they may well do a lot more baking. And they may well do a lot more interesting baking as well. Their desires don't really change.