Every month seems to bring another episode of sensitive personal information escaping into the wild because a corporate or government laptop computer is lost or stolen. A common response is a lot of hand-wringing over how the data should have been encrypted. But some key questions usually go unanswered. Why is so much private data allowed to be on laptops to begin with? What do people do all day that compels them to tote around records on, say, 26 million Americans, the staggering number seen in the recent Veterans Affairs case? “It’s pure laziness. There’s actually no excuse for it,” said Avivah Litan, a security analyst for Gartner Inc. “There’s no good business reason for it.”