Even Scalia believes you need to look at the law's construct (in constrast to the architect's personal opinions):
Who said that we "must do our best, bearing in mind the fundamental canon of statutory construction that the words of a statute must be read in their context and with a view to their place in the overall statutory scheme"? Why, it was Justice Scalia (actually quoting an earlier opinion by Justice Sandra Day O'Connor) in a decision just a year ago.
And who said that "a provision that may seem ambiguous in isolation is often clarified by the remainder of the statutory scheme" because "only one of the permissible meanings produces a substantive effect that is compatible with the rest of the law"? Why, Justice Scalia again.