The collective thrust here is interesting. None of it strays terribly far from my own thoughts (including those comments that question my overall approach). To a few of those thoughts...
Pregens & Redesign - In retrospect Pregens, which never even occurred to me, probably would have been a boon. They were eager to make their own characters, but had negligible interest in creating a cohesive (or even functional) party. I am always open to even sweeping redesign, but it isn't a viable option until they stop trying to make characters that render one or more (often all) of the other players irrelevant.
Player Selection - Of the seven players, I only even invited five. Those five apparently had enough fun that they asked two more to join. I permitted this because the ultimate goal is to get them playing with their friends. But it has since become apparent that the latecomers are after an entirely different experience than the others.
The Rails - Moving off the rails is my general preference, but they aren't ready for it. None of them wants to lead, nor to follow the lead of anyone that isn't an NPC. In the absence of player requests, the module moves forward.
Wealth - I rarely hinge the party's wealth on their combat performance. I rarely hang too much importance on monetary wealth at all simply because most of character wealth will be spent on ways to improve combat performance.
Murderhoboing - Been there already, Just A Mort. One of the PC's assaulted a journalist, earning the party's employer exceptionally bad press and earning the PC an earful. In the very next scene he attempted to murder another PC, was subdued and locked up to await trial. He then died in an escape attempt because the player didn't think I was serious about consequences. He still doesn't. He's having his fun by trolling the rest of the party.
Removing Players - With this particular group, this isn't an option for me. If the majority are unanimous about it, fine. But they aren't unified. Heck, one of them got incredibly bent out of shape that I would kill the previously mentioned murderhobo because it didn't fit with his own personal story. Note that... he was pissed because he wanted to basically have the fellow owe him his life and be his slave.
Anyhow... thank you all for the input. I believe I'll tone down the teaching and let them slit their own throats if they can't get it together. I only agreed to run something a bit more substantial than a single-night module. Some measure of responsibility for coming together as a group has to fall on them. If they continue going out of their way to do the opposite, there's only so much I can do.