I always thought this was VOIP calls, no phone company required.
And frankly, someone is buying this shit. Else they wouldn't call. I mean if 1 sale is made for every 5,000 calls they've made their money. Same with scammers. Who the hell is going to fall for a robocall from the IRS? A call that's barely in English, and comes from a local number? Obviously, somebody does.
Old folks.
To stop this, the phone company should charge 10 cents to place a call. That would destroy the economics of spamming.
The same goes for email. Charge a penny to the originator to receive an email.
It's just ridiculous that every shared mailbox (like an apartment) has a giant recycle bin next to it full of mailers.
I feel like more of that blame lies with the government as a whole than the post office in particular. They have to get innovative when they don't take Federal dollars, get dollars taken from them, have to fund retirement of their employees out further than other agencies, and can't close offices. It surprises me that it stays afloat despite active hindrance from the government at large.