> ... and how much of a corporations tax-deductible costs can go to C-level salaries instead of everyone else's salaries, much of the need for unions would go away.

Something like that was already instituted under Bill Clinton - corporations can't deduct more than $1 million of an executive's salary. That was actually a big part of why compensation shifted to stock options - I don't think that was a good shift, myself. CEO's and high level executives now make a lot more short term decisions than they used to when they got, say, $6 million in salary and a dramatically smaller option pool. Back then their main concern was keeping the business running smoothly to ensure their jobs. Now it's all about getting the stock price up as much as possible in the short term, often with disastrous results. Also, executive compensation actually went up as a result of the shift to stock options... it's ironic that the government trying to limit executive compensation helped stimulate an increase in executive compensation. Unforseen secondary effects can be funny like that.

> ...much of the need for unions would go away.

Much of the need for unions has gone away, but unions do not voluntarily close shop. Do you think they would do so? It hasn't happened yet...