50,000 baht is peanuts over a 5 night or 7 night trip. Hotels, shopping, sightseeing - coz a lot of them come for family holidays and go for all the touristy things to do and see - and if they're in male groups, "night entertainment", it's very easy to exceed this figure.
Unfortunately, a lot of people in this forum have made it a habit of "India bashing" or any non-white country.