What is the incentative to create/build a business, product - or invent something in a society/government that wants to "spread the wealth"?

If it’s true…in America, that we need to “spread the wealth” – then why create wealth to begin with? What is the reward – pat on the back? Self pride?
Why not just sit back and reap the rewards of others hard work?
*I’m not taking a stand….just interested in what others have to say.
*Sorry not a political major or whatever…maybe I’m just not wording the question right.