Well they are only interested in having visitors with a little class, not like cheap Charlie Thailand - welcome everyone and brings lots of money, the more the better, we have thousands of prostitutes, plenty on rip-off schemes, two tier pricing for stupid farangs, pick-pockets, lady-boys, dishonest cab drivers, we have refined the removal of money from you to a fine art.
I'm sure this is exactly what Bhutan is looking for.