Economics - hands down. It's obvious that way too many people have no clue.
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I don't care much whether they delay or not, but I think what they SHOULD do is shut down the signals on Feb 17th as planned, but only for 24 hours. Then, tell the whiners "ok, we've been warning you for years now, that was your final warning". Then shut it off on the new deadline without any additional delays - because you know there WILL be more complaining when that day rolls around too.
Of course, this would all have to also depend on the gov't actually getting those coupons out to everybody - THAT you can't blame them for.