"Many people rely on physical mail for things like social security checks, taxes, bills, communication with family and friends." A somewhat higher postage rate

"Many people rely on physical mail for things like social security checks, taxes, bills, communication with family and friends." A somewhat higher postage rate would not affect this that much, and no, there are not that many people always sending letters, and broadband isn't required to pay bills. The vast, vast majority of mail (even bills sent etc.) is completely wasted, it would be incredibly more efficient to dump it in lieu of sending 'only the mail that is needed'.