Is an efficient, employee-friendly travel program an oxymoron?

This SAP Concur blog post discusses creating an efficient and employee-friendly travel program. It notes that tickets booked fewer than seven days before departure cost an average of 44% more than those booked 15 or more days in advance. T&E is one of the largest controllable expenses, but employees have little incentive to limit spending on reimbursable business travel. The article recommends analyzing existing spending, evaluating ROI of solutions, writing clear policies, and using incentive programs to manage spend.