Then you may as well make businesses pay $1000 an hour, right? After all, you claim that forcing them to pay more does not cause any harm.
By that same token, it wouldn't be harmful to you if they passes a law that said you specifically had to give all your money to charity.
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How is that a business' problem?
It's not. That is the part you fail to grasp. If it were, then any business that chose not to hire someone would be causing that very same "harm" you seem to want to blame them for.