Want to bet??? I am a small buisness owner and there are few loop holes and NONE that i am aware of that will elliminate "most of these taxes" as you say....
Let's say you earn $72,000 per year as a self-employed small business owner. There's no reason why you can't convert your business from a sole proprietorship to a corporation, pay yourself $1,000 per month in salary, then distribute the remaining $60,000 to yourself in the form of dividends.
Dividends are subject to income taxes at your applicable tax rate, but they are not subject to payroll taxes.
If you Freep-mail me and let me know what kind of business you are in, I may be able to offer a few more general tips.