Possibly, but did you read his resignation letter? I personally don't think that it was so mercenary a motive. I agree with Hugh Hewitt that perhaps Luttig was simply getting stale in the Court of Appeals, and needed a change of scenery. And moving to Boeing's General Counsel position and a Corp. V.P. slot therein presented a unique opportunity to still serve the country. That is clearly true. Above all, Luttig is a patriot.
Hugh is still nurturing the hope that Luttig is still on the short list for nomination to the Supremes, and could indeed find the Boeing interlude helpful and educational. While I believe the latter is possible, the former is just plain "damn" unlikely.