My friend I have done that also. I did it for minimum wage. I do not work for minimum wage any more. It was not lettuce but sugar cane, a drilling rig, and tug boats. All those jobs were given to me by millionaires and I was grateful to have them. I am now in the top bracket of income tax and am very glad those millionaires gave me those minimum wage jobs. I did those jobs for me not as a service to someone else. Hard work is okay even at minimum wage if you have the desire to succeed and prosper.
So you paid you?
Oh no, that's not what you said, the millionaires paid you.
But, even if so (it's possible to own a business and NOT be a millionaire) who paid the millionaires? If nobody paid the millionaires to channel the money from YOU to these poor menials for those things, you can rest assured the millionaires wouldn't donate their own funds, and you'd be without lettuce, clean toilets, waited tables, rung groceries (someone has to watch even the self checkout lanes). They're not stupid with money, that's how they are millionaires.
Oh, and in the same sense, the millionaires did nothing for you: your argument collapses.