Well it's culture, my wife told me about superstars in Thailand paying millions in dowry.
I married my wife 15 years ago and didn't pay a single satang. Her parents from Issan has never asked me for money. On the contrary they have asked me if I needed any.
When my wife's sister married her husbands family came with 300 k and gold and gave to my mother in law. She just commented "you need it more than me" and gave it to the wedded couple.