Why do you think English Jurisprudence is better than your own laws?
Just check in how many rules and regulations the Govt that follows Englsih Jurisprudence says upon attaing 18 year a son is not a dependent but an unmarried daughter even she is 60 years of age is a dependent.
Ok. Dont follow Shariyat Law.
But what about your own Arthshastra? Even Kautilya advocated similar punishments in Arthshastra! And Arthshastra is universally acknowledged as one of the most comprehensive compilation of practices of good statecraft.
