I remember talking with Andrew Layman, one of the SOAP architects at Microsoft. He let slip that it was actually a Microsoft objective to make the standard sufficiently complex that only the tools would read and write this stuff, and not humans. So that was a strategy tax that was imposed by the big companies on some of this technology, where they made it more complicated than it needed to be so they could sell tools.

Tim O’Reilly (source: WS-* vs. the REST )