Since we are suggesting decisions for which we have no understanding or authority, why stop there?
Any child older than 4 still believing in Santa Claus or the Easter Bunny ought to be terminated. Since these are nominally religious figures it is most likely these children would be inclined toward fundamental Christianity anyway.
Perhaps that might be a bit harsh so we might grant an exception for those who continue to believe in the Tooth Fairy, like Paul Krugman and Ben Bernanke (not sure on their religious orientations but the tooth fairy thing is a given.)
We could then create jobs by hiring a new army of government employees to interview children and make the termination decisions. Each should have a corner office with a nice view and should be able to retiree on a generous government pension in their 50's.
I am sure they would all work very hard in these jobs doing this worthwhile and valuable work. They should also be paid for not working on all holidays including Christmas Eve and Christmas day.
They should be unionized since we don't want them to be forced to work too hard. No one likes coercion.
Of course union dues would be automatically deducted from their paychecks. Union leaders could then make the decision on which candidates to support.
Its really a good plan and win win for all concerned.