Not a bad idea. In France, an insurance company will subsidize the purchase of a Helite airbag vest or jacket, to the tune of a maximum of €200. You'll need to subscribe your motorcycle insurance with the Mutuelle-Europe , and buy one of Helite's Airbag jackets. Helite offer many different models, ranging from simple hi-vis vests (but with integrated airbag, prices start at €419) to full motorcycle jackets (ranging from €429 to €639).
Depending on the model, the insurance company reimburses between €100 and €200.
Wouldn't it be great if all insurance companies reimburse part of any safety gear purchased, like helmets, gloves, etc. It's in their best interest...
Click here for more info on the subsidized Helite Airbag purchase (in French).