It seems that if you consider about 1000 USD for food per person per month, 1000 USD per housing per person per month, and 1000 USD for utility and clothing per person per month. that is about 3000 USD per person without considering extra expenses for like a new phone, computer, handbags, or automobile.
If you multiply that by 10,000 people, you get 30 million USD per person per month. That in turn turns into 360 million dollars a year and potentially 36 billion USD in 100 years. Who in the world can have 360 million USD in expenses every year?