What the problem exactly,
In this U.S.A if you caught drink driving your green card/visa will be revoked.....will likely go to prison for a few months, never can return to U.S.A etc
In thailand, if you're caught, you pay 20k baht on the spot fine, and you get off with no record of the event
-- Yes it's illegal what thai police do but its much better than the alternative - being locked up in a thai jail for a few months and blacklisted from the country