BREAD IN IDIOM
Those on the breadline live a bread and cheese existence unable to break bread with others or even to fill their hungry breadbaskets. Unless, that is, a breadwinner knows which side his bread is buttered on and decides to use his loaf and cast his bread upon the water. Such a bread and butter way of life can be brightened by the bread and circuses of popular entertainment--without doubt the greatest thing since sliced bread--yet entertainment always seems to cost a lot of bread, and one cannot help but feel that some people are only able to earn a crust by taking the bread out of one's mouth.
Robert Frost (1875-1963)