I think many forget that the USPS is self supporting. Postage can't remain the same forever. How will the vehicles gas cost, etc., employees pay, get done?
When I spoke to my carrier, he said the post office can't just add a surcharge whenever for cost hikes like FED EX and UPS can.
I think we all need to be patient and thankful that we do have this provided - shipping.
Also, as far as envelope regs, do you want your package to arrive untorn and in good condition or ripped where materials may be missing?
Rules need to be in place. It's good common sense to not overstuff so that the package we are shipping doesn't end up torn.