Here are my 2 cents on the issue....
Argument A: If a person has an advanced degree from a US university, it can be considered that his/her BS was good enough for admission to MS and hence good enough for FE/PE
Argument B: I will buy argument A for Engineering/Math/Science, but not for humanities and social science and you have to be competent in those subjects to become a PE.
Argument C: IF and only if argument B is true, then why not test an individual's competence in humanities and social science in the PE exam? Just like California has an extra exam (Seismic?), states which insist that humanities are very important for becoming a PE can have an extra exam for humanities. Those who have completed BS in USA should not find it difficult, and those who have foreign degree, have an oppurtunity to show they have required knowledge.