Bruce Perens dans un commentaire sur Slashdot:

The rationale behind the BSD license was that since the taxpayer had already paid for the work, he should have maximal usage of that work. In contrast, most modern Open Source work is not federally funded. I am happy to use the BSD license on my own work when someone pays me to do so. If I'm the one paying, GPL is justified.

Ça, c'est de l'argument !