I can speak for a lot of clubs around the Chicagoland area in saying that these clubs have routinely opened up their doors to "the outside". Most every club I can think of has donated their course and their resources to the USGA, CDGA, PGA, IPGA, AJGA, IJGA, WGA, Evans Scholars, Veteran's Funds, Hospitals, High Schools, etc.
Seems to me that a lot of you want personal access for something that you have not paid. I don't get it. Again, if you want to see a course and don't to pay what others have and are willing to pay to join, buy a ticket to an event. Surely, in 99.9% of cases, there will be one.
Yes, private county clubs in the US are a bit exclusionary - but not any more so than any other activity. You want to take the train to work, you need to pay for it. You want to fly to a new city, you have to pay for it. If you want a warm napkin, nuts and all you can drink swill wine, you pay a little more. Private golf in the US is no different.
If you are in a metropolitan area where wages are higher, labor is higher, land use is higher and the demand is apparent, the price just happens to be higher. So be it.
Playing great golf courses is a privilege, not a right.