Forget saving up for retirement. They're saving up for burnout.

Getty Images; Rebecca Zisser/BI Some workers are creating "burnout funds" in case they have to step away from work. A burnout fund is a savings pot designed to fund a recovery period. These funds have arrived as the pace of work accelerates, job security slips, and costs keep rising. People have long saved for life's biggest milestones: buying a home, getting married, and retirement. Some workers are also putting money aside for something they hope never happens: burnout. Last week, Mary Kane…