To be fair billybob, it's probably not the postie who doesn't want to carry your parcel. It's probably his boss who is scared of the claims for unfit posties with bad backs in later years.
Still could be worse, rumours from my postie is they are introducing wheelie trollies like the USA and they'll never carry bags again. So the rounds will take twice as long, and where do you 'park' your trolley whilst you go in a block of flats? Oh yes, they are now pairing up posties, and have them in a little van too. Sigh!
Regarding competition – the big companies only want the money making sorting machines, ultimately the postie will still be employed to deliver all the various postal companies envelopes/parcels 'cos that's the expensive labour intensive bit they don't want.