150 USD/month for a family of 3 is a quite modest number for me, it's really a very low standard of living compared to the standard of living in my country. My family consists of 4 people, every month I have to spend about 400$-500$ and we are a poor family, belonging to the low-income class in my hometown. I am actually quite surprised with the level of spending in Bangladesh, it is so different from my country while my country is not richer than Bangladesh.
If you need to adapt to a certain level of income when there is no other choice, then this becomes a necessity. Probably in every city there are wealthier families and there are those who cannot even afford to buy a washing machine. Over the weekend I bought myself a new one and asked my neighbors, maybe someone needs my old washing machine. My neighbor said that she had a friend who didn’t have a washing machine. I didn’t think there were such poor people, I gave it to them as a gift.
And not far from me lives a very rich family in a two-story house, they have a Tesla and a landcruiser, so poverty and wealth go side by side.