I have a couple of friends that are police. I was talking to one of them and asked, When you have checkpoints why don't you get someone with bulbs for motorcycles and charge them a few hundred baht to change them right there? His only reply was, It is already illegal.
They don't get it. They care more about collecting money than fixing problems. I think their mindset is more like well if we have them fix it we won't be able to collect a fine next time.