Dude, you're not even in the US. What mail do you get from the USPS? My mailbox contains 99% worthless stuff. Even Seinfeld had it right back then.
Yeah, it's all government stuff. the government could move it electronically and that would be the end of your "valuable" mail. Or official government mail could be processed for free via the mail and everyone else could pay the $3 or whatever price to send the worthless mail. You wanna be all ecological all the time, think about what this would do to the USPS carbon footprint, in addition to all that paper and ink.