The Russian writer Fyodor Dostoyevsky has put it in a nutshell: if you overwhelm a person with luck, he will risk everything for any kind of lapses - if only to be ungrateful. Too many happy days are hard to bear, as the saying goes.
The Pursuit of Unhappiness
What can we do daily against our possible happiness? After reading, you too will understand why you would like to slay the neighbor you asked for a hammer.