Telegraph: The idea is that buyers will be entitled to a discount on a new car if they scrap their old one. The scheme, which is billed as an environmental measure because new cars are more fuel-efficient, is intended to throw a lifeline to Britain’s ailing motor industry. Whatever the reason, consumers stand to benefit from lower prices on new cars. We can get a an idea from the experience of other countries, many of which have introduced “scrappage” schemes as Britain and Poland are the …