Can somebody explain why on earth our highest ranking pilots are barred from competition in the 2013 Argentina WGC??

Not sure what you mean by this......
John Cochrane

I understand the rules which prohibit a pilot like Doug Jacobs to
compete in WGC 2013 in Argentina. My question to all reading this
forum is why we're these rules created? What's the reason for this
rule to prohibit a pilot like Doug Jacobs to compete in a club class
world championship? Just curious of the history behind how this came
about.