Pitdown
You are indeed correct about the sorce of the problem but not the intended result.
UK airport security has been 100% successful in its intended result! it has protected the (self perceived) political elite from the media, it has enabled them to be seen to be acting robustly on terrorism while also having the side effect of keeping an army of low pay workers in employment...... The real bonus is that it is the airline industry that is paying to shield them from the problem.
The root of the problem is that we no longer have any political leaders who have any experience outside the Westminster bubble and are unable to see any anything in terms outside this bubble. I can see no way that we can solve this problem without a major political unheaval.......... May be UKIP will provide this in May, but I won't be holding my breath.