Sir without interest your economy will come crumbling down. I don't want to go in a full blown discussion about whether interest is right or wrong. However, I would leave you with one bit of information to ponder about.
Imagine country A has 2% inflation rate in a year and $100 in that country can be used to purchase a certain amount of food items. Due to the inflation rate after one year the same $100 will only be sufficient to purchase commodities worth of $98. That is why interest rate is linked with the inflation in the country and the strength of the economy. If there was no interest, $100 left in a bank account will depreciate to an actual value of $0 over time.
I do agree that earning an income through interest shouldn't be allowed, but having 0% interest rate is very harmful.