Labradors are just naturally greedy. Whatever you give them they'll eat, and if you don't restrict their diet, pretty soon you'll have a coffee table on furry legs. It's not good for them or kind to them.
Whereas bankers are capable of restraint: as recently as this January, RBS boss Stephen Hester turned down a bonus worth almost £1 million. He and Bob Diamond are good examples to set our much-loved but undisciplined pets.