By Barb Shelly, Kansas City Star editorial page columnist

Luann Ridgeway, the Missouri Senator who sponsored the bill to free motorcyclists from the onerous responsibility of wearing helmets, explained her helmet aversion this way in an interview with The Star earlier this year:

"You have people who don’t ride motorcycles pointing fingers at motorcycle riders and saying, ‘I’m going to tell you what’s best for you.’ "

Behold, the pointed finger of Gov. Jay Nixon, who today vetoed the legislature's repeal of Missouri's helmet law.

In his veto message, Nixon cited the reasons for his decision:

When Florida repealed its universal helmet law in 2002, the cost to treat patients diagnosed with head injuries as a result of motorcycle accidents doubled, reaching a total of $44 million. [Traffic Safety Facts, NHTSA, 2008] Nationally, one academic study estimated that the total cost to treat motorcycle accident victims who were not wearing a helmet is $250,231,734 a year more than the cost of treating victims who were wearing a helmet.

So, Sen. Ridgeway et al, it's not really about telling motorcycle riders what's good for them. It's about protecting state taxpayers from having to cover enormous medical bills for preventable injuries.