This is going to sound loony, but I'm going to put a free market slant on this...
Imagine if the airline industry was forced to handle security based on customer preferences. That is, they're forced to allow the market to choose the mode and level of security they're willing to adopt based on the price system.
Some airlines would have a strict "fly nekkid" rule. "If you wanna fly with us, take off your clothes."
Some airlines would let you fly completely clothed, but would require every passenger to submit to a body cavity check. (I don't think the current generation of BSIs can scan a human's internal structure. If I were running a terrorist cell, I'd know that and I'd be putting equipment up the bums of my recruits.)
Some airlines would let you fly clothed and wouldn't require any security check at all. As in, "fly with us and take your chances."
Some airlines would guarantee 5 armed marshalls on every flight. Other airlines would allow passengers to carry firearms, knives, mace, etc.
And on and on... lots of choices for the customer. The customer gets to choose the mode and level of security based on the price system.
For example, if someone has very limited funds and is unwilling to travel by other means (e.g. car, train, bus, hitchhike, etc.), they can choose the "fly with us and take your chances" airline. The price will likely be low due to lackluster security (though this is pure speculation on my part, of course). Others would choose alternative options, including eschewing planes entirely.
Just thinking aloud here. What we know is this...
The TSA, DHS, and DoD are worse than impotent. They exacerbate the security issue. And they have given us no reason to believe they will improve their performance - even with massive injections of public funds.
The danger is that the populace will continue to place their trust in the state. That opens the door to some nasty outcomes. It will increase graft. It will continue to deteriorate liberty (when BSIs begin looking within your colon, will folks still say "whatever it takes to secure our safety"?).
Again, just thinking aloud. If you take the state's moves to their logical extreme "all in the name of public safety during these dangerous times," the future of liberty looks bleak.
Remember, we weren't saddled with 60,000 pages of tax legislation in one night. It took a few years. Do you believe this will turn out differently?
Addendum: the flaw in the plan described above is that planes on which security is lax could still be flown into structures, causing damage and carnage. That's obviously a problem. The only way I know to fix that is for us to stop messing with other nations. I'm no foreign policy expert, but bin Laden has been very clear that he's messing with us because we've messed with others.
I'm not suggesting isolationism. Instead, I'm suggesting a return to the views held by Jefferson...
"I am for free commerce with all nations, political connection with none, and little or no diplomatic establishment. And I am not for linking ourselves by new treaties with the quarrels of Europe, entering that field of slaughter to preserve their balance, or joining in the confederacy of Kings to war against the principles of liberty."