Just like damp, warm areas in your house are conducive to breeding cockroaches, more invasive government intervention creates a welcome environment for corruption and sleaze.  So says Daniel J. Mitchell from the Cato Institute in this instructive video:

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As Mitchell points out, with every ethics scandal we have, we simply pass more and more laws to serve as a band-aid to cover the problem – when in fact, it’s government intervention itself that is causing the damage.  The only way to scale back pay-for-play and behind the scenes dealmaking is to limit the areas that government (and therefore the lobbying community) actually controls.