Authenticity

Authenticity
2007.04.24 2:11

According to some sources mainly in Wikipedia, Romans, First and Second Corinthians, Galatians, Philipians, First Thessalonians, Philemons were actually written by Paul, the authenticity of other letters believed to be written by Paul is uncertain.
Paul was an Apostle, not a political leader like Moses, or King like David, Solomon, or prophet like Jeremiah, so my question is why there have to be someone who had to write under the false identification of Paul, was there any merit? Or is the entire argument based on just an ambiguous speculation?