It's simple John.

The poorest people in the country are assisted by exempting them from tax altogether until they reach a predetermined threshold (an income on which they can realistically survive) and then gradually reducing the assistance until a further threshold at which they can actually have some quality of life.

The idea is to address the comment above from Dick about flat rates.

And it is true that percentages aren't the best way of expressing the idea, but you still achieve the situation where ten times the salary equals ten times the tax.

Saul too is right when he says it must include Corporations and investment returns.

Don T.