In my mind, this could be solved fairly simply with government regulation. The government can sell tourism passes to enter the country, therefore socializing some of the profits of tourism, or even just hand them out in a lottery. It seems obvious that this will need to be done at some point; there are fundamental limits on how many people a country's infrastructure can support. Without the government stepping in, it will only get worse.
This is actually done with certain destinations in the US. For example, after "The Wave" in Southern Utah became tremendously famous (driven, IIRC, by a very nice desktop photo distributed with Windows), access became permit-only determined by BLM lottery.
I've been trying the lottery w/o success most months of the last year. It's frustrating not to win, but it's a fair way of meeting the demands of both access and preservation.
