Why NRIs are called Non Reliable indians ?

I've never heard that one before but maybe it's because I'm one of them? LOL Seriously, I was born in London, UK, of Indian parents. I'm a British national but consider myself Indian. I visit India every year for a few weeks and don't take anything away from India to be called "non reliable". I earn good money here and love shopping when I go to India, it's money that I made for myself and I tip very generously when I go to restaurants and don't haggle when I buy from markets or street vendors. Does that make me non reliable? I don't know. I know it's supposed to be a bit of a joke to call us that but it does actually hurt a bit to think that we're referred to in that way... Anyone else feel the same?

dont know .... sorry but this is not at all good ....

i really have no idea about it