vercingetorix, I can't believe how wrong a post can be.
The USPTO quite categorically states, that they will not administer the USPTO exam as an academic exercise. In order to be eligible to sit the exam, you must be eligible to register. Which means you must be a citizen, a resident or a foreigner ... though only Canadians may be registered as foreigners at the moment. I suggest you take a stroll through the General Requirements bulletin
http://www.uspto.gov/web/offices/dcom/olia/oed/grb.pdf and see just what it takes to be eligble to sit the exam. Your statement that "anyone ... from any country in the world ... can pass the USPTO exam" is just blatently wrong.
I can explain the number of USPTO practitioners with non-US addresses for you. Here in Australia, there are about a dozen of us (worrying numbers, I know). The majority are expats who moved from the US to Australia and retained their US registration. These people have had to totally requalify in Australia (a much tougher process than sitting 100 multiple choice questions, I can assure you) and they can only do this under stringent residency requirements ... just like the US. Myself, I am a dual national, and so I qualify as a US citizen without having lived in the US for any of my working life, but I am a bona fide US citizen, by birthright, just like the rest of you. So I very much doubt that anyone has, as you say, flown to the US, sat the exam, and flown back unless they were completely eligible by virtue of their US citizenship.
Your beef seems to be with outsourcing of patent drafting. Might I remind you that anyone, absolutely anyone, may draft a patent. It requires no technical qualification, nor any registration, anywhere in the world, to draft a patent. The "checks and balances" come into play with liability. Only registered practitioners may file in the USPTO, with one exception being the the Applicant/Assignee. Registered practitioners are liable for the work filed with the USPTO, and thus should be checking any work that they have not themselves drafted. When the Applicant/Assignee files the patent, they themselves take the liability. So having an unqualified, unregistered draftsperson in India or China drafting a patent is no different to an unqualified, unregistered technical assistant drafting a patent within a US law firm ... it is exactly the same. Or what about when I draft an Australian patent for an Australian client ... as a US agent, I take the liability when I file into the US ... or, I could file through a US attorney who would then take the liability.
Maybe your beef is just with those lucky enough to have dual-citizenship. Yes, an American-born Chinese may be lucky enough to be able to qualify in 2 countries, just like I was. It has nothing to do with Harry Moatz or the USPTO being benevolent to foreign nationals. It is just the USPTO looking after its citizens and every other country doing the same. How else do you propose to do it ? Why, as a US citizen, would I not be allowed to qualify in the US. Every country I am aware of has a citizenship requirement for registration ... the US included.