I'm self-employed for over 20 yrs and here's your answer:
I'd have to raise the price of my services 30% to cover the tax...Why would I lower my service price knowing I have yet to pay tax on any money I choose to, or even have to spend?
If I lower my service price equal to what my income taxes were, what happens when I pay the new federal tax on what I spend?...I lose.
I'll reduce my income when you agree to reduce yours.