What is the purpose of this new spam call tactic?

I wish there was an option to charge the other person for the phone call they made to you. Just a token amount like $0.50. If you wanted to charge them you could, if you didn’t you didn’t have to. The money could go into a fund to stop telemarketing scams and the person reporting it wouldn’t benefit.

It seems like that would allow free phone calls between people but cut down on spam.