Most of the people dying ain't of working age, that's why it doesn't matter. Working age people might suffer for a couple weeks to a month, but then they'll be good to pull up the boot straps and get back to work. Maybe we'll lose a -few- working age people, but sometimes you gotta just cut the fat.
Also if they kill off a bunch of old people it's an added bonus to the economy because there's less people to pay social security and medicare to.