Problem with the GPL

The GPL has a problem. A problem that would be vey difficult to solve. A problem in the underlying workinks of the GPL.

The GPL works because of copyright. It gives people rights they otherwise would not have. However, the author (as I understand it) is NOT forced to abide by the GPL. Therefore, they can release something under the GPL without the source code. Because of this, the software would be no different than without the GPL.

Why would they do this? Because releasing software under the GPL looks good, but that doesn't mean that they would want to release the code (for whatever reason).