If the rich don't like paying so much tax the answer is simple. Stop paying yourselves such huge amounts and the tax bill will amazingly drop with no need to dodge or avoid.
And while your at it, use the money you are not paying yourselves, and give it to the low paid people in the company...
The question was - If you were given a totally legal way of paying less tax would you take it.
So pointing out that some people do jobs for cash is irrelevant as that is not a totally legal way.
In terms of legal tax reduction, i don't think you can reasonably compare a self employed person...