gambling is a business industry that pays taxes so I don't think it's going to be a bad economy if everyone's gambling, Macau would've gone up into flames a long time ago if gambling was bad for the economy.
Casinos wouldn't have been allowed in numerous nations if it caused bad economy. The house makes more money when wagering increases, and it helps the economy through taxes. Although, gamers make the losses, and it affects the financial economy of individual families, Governments and gambling platforms work together, before it's allowed in the nation. So, Casinos have heavy payments to offer the nation as well.