There are a lot of no integrity, self-serving, greedy losers like you! I retired as a UPS driver and lots of time people over or under paid for their c.o.d. packages, as much as $1000.00. In our case, we were responsible for shortages regardless of the amount.
Sounds like your MOM and DAD did a "real fine" job of raising you. What's even worse is you probably raised your own kids the same way.
Just remember, Karma can be a m..... f....., what goes'round, comes 'round!