Conway's misuse of taxpayers money is no different in seriousness than the almost serial corruption at the heart of Government. It may seem 'less' to some but when Blair said the politicians need to be 'whiter than white' he was expressing a hidden truth. One bad apple does not of course ruin the entire harvest but when you keep getting bad apples, on all sides, then people start thinking they might actually prefer pears.
These constant scandals are not the invention of the media, sleaze as it is colloquial known in the 'village' is a very real problem and no one is safe from it. It damages the value of democracy and it is exactly the sort of thing that pushes people to support the smaller fringe parties some of which leave an untold amount to be desired. Parties like the BNP will use these incidents and point out that they are not tainted by such things. You may think that people won't vote in droves for the bigots and that is probably true, but the more they see the non-bigots acting so appallingly the more they will ponder of spoiling their ballots or protesting.
It wouldn't surprise me if you could map the growth in the 'none of the above' vote against the growth in the 'sleaze' scandals of the past few years. No one can expect every politician to be pure of course, they are human after all and so by their nature flawed. But the system is clearly broken and needs fixing to ensure that they cannot pull off such dodgy scams in the future. Better to fix the system than have the result at the ballot box smash us around the head with the reality of unintended consequence.