A maximum wage is impossible. That is why three weeks ago, I posted the thread about limiting net worth.
http://www.tfproject.org/tfp/showthread.php?t=105021. I have an invention idea that if 100 million people around the world bought one, I would be a billionaire. Would I have to slowly roll it out and cut production to stay under the maximum wage for the year?
Yes, it would cause major problems with the value of the currency, but having a 80-90% tax rate on income once you get past 200 million would even out the income distribution in this country a little better. And the lifestyle one family lives doesn't change if they are worth 200 million or 2 billion. The amount they have to invest changes though.