我国居民消费对GDP增长的贡献率为46.89%，而发达国家为70%以上。近年来受世界金融危机的影响，我国消费市场低迷，而储蓄总体却持续增长，我国居民的消费已成为制约经济发展的一个关键因素。为此中央采取了多种措施刺激国内的消费需要，提出了扩大内需的方针，如“家电下乡”、“汽车下乡”享受国家13%的财政补贴。运用经济生活知识，简要分析我国政府为什么要提出和坚持“扩大国内需求特别是消费需求的方针”？
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