Companies Get Tougher with Employees Who Smoke

Businessweek reports:

Many companies use quiet incentives to encourage desired employee behavior, such as losing weight. Not Macy’s (M). Beginning on July 1, workers at the department store chain who admit to using tobacco will be surcharged $35 a month, or $420 a year, for health coverage. The extra cost will be deferred only if smokers enroll in a free quit-smoking class. Their progress will then be reviewed after six months.

How long before people with extreme BMI's get charged higher rates?