Why has Thailand scrapped its 60-day visa-free policy for over 90 nations?

Thailand has scrapped its 60-day visa-free policy for over 90 nations in an effort to curb crime involving foreign nationals. A recent series of arrests of foreigners has included cases linked to drug offences, sex trafficking and foreigners operating businesses such as hotels and schools without proper permits. The new visa-free duration would be decided on a country-by-country basis.