Jim Thompson,
It's a good, yet difficult question.
An immediate answer would be a dramatic increase in the cost of water, or, the rationing of water.
But, both of those examples are beyond the internal decision making capabilities of most clubs.
There are certain clubs that are held up and out to be shining examples of "Golf, as it should be"
Unfortunately, until those clubs go the brown-yellow-green route there's little chance that others will follow.
Fisher's Island and Newport are great examples of BYG=Beautiful, but, how many golfers get the opportunity to play those courses. And, wouldn't the counter argument be that FI and NCC can't water those courses if they wanted to, and if they could, they might.
Water can also be great camoflage.
When green budgets are inadequate water can used to mask inherent problems.
The heart of the problem is democracy.
If a club has 400 members, you can be assured that they watch TV during the winter, or head off for occassional golf vacations in the South or Southwest.
If 300 of those members see nothing but green on their TV screens, and at the golf courses they frequent during the winter, what are the odds that the membership will want and endorse brownish-yellowish-green conditions when they return in the summer ?
While TEPaul may be optimistic, I don't see a grass roots movement of the magnitude he suggests.
However, I do see the awareness and desire to go that route on the part of some superintendents, but, in most instances they don't dictate course conditions.