This is laughable.
Thailand already has one of the World's worst road fatality rates. Letting bars stay open later is hardly likely to contribute to that. Punters don't have infinite funds they'll still spend the same amount just at different times as has been shown in other countries that liberalise pub opening hours.
The bigger issue facing Thailand is the lack of law enforcement, have the police apply the laws that exist more vigorously and equitably. That's the route to solving many of Thailand's problems, not more, or more restrictive legislation.