That is why we need to increase the cost of each phone call and reduce the percentage who actually fall for it. If it only costs $100 to bother a million people

That is why we need to increase the cost of each phone call and reduce the percentage who actually fall for it. If it only costs $100 to bother a million people, but you can get $1000 from a dozen people who fall for it, then it remains a profitable business model. If however, it cost 50 cents for each call then cold calling a million people now has a half million dollar expense. You have to get a lot more people to fall for it in order to cover your costs.