The Buddha made it clear that there is no flexibilty here. If one chooses to lie one must accept his kamma but the Buddha NEVER said that it was ok to lie or that there is flexibility.
Herein someone avoids false speech and abstains from it. He speaks the truth, is devoted to truth, reliable, worthy of confidence, not a deceiver of people. Being at a meeting, or amongst people, or in the midst of his relatives, or in a society, or in the king's court, and called upon and asked as witness to tell what he knows, he answers, if he knows nothing: "I know nothing," and if he knows, he answers: "I know"; if he has seen nothing, he answers: "I have seen nothing," and if he has seen, he answers: "I have seen." Thus he never knowingly speaks a lie, either for the sake of his own advantage, or for the sake of another person's advantage, or for the sake of any advantage whatsoever. - AN 10:176
If the text above be applied with 0% flexibility, then what a blessing it was for the Jewish people during the Nazis period for not having to hide in the basement of a German Buddhist family...