In that case, those lawyers, doctors, or other top wage earners will probably be paying less tax, and so are the real middle class - those workers on W2.
However, guys enjoying all kinds of loopholes, like Buffett, Gates, or Romney, would have to pay a lot more. Their personal wealth is a lot more about how they spend their money, a whole lot less about job market.
Policies shouldn't be about whether I like it if it's benefiting this or that group, but rather it's fair and reasonable.
To me, everyone has obligation for tax, and every penny you earned is equal.