Because Americans find it difficult separate what they say from the person they are saying it to – especially in the case of criticism – they strive to use softer, more indirect language, including euphemisms: mild or indirect words or expressions substituted for ones considered to be too harsh or blunt when referring to something unpleasant or embarrassing.
Examples of euphemisms: pre-owned car instead of a used car, sex worker instead of a prostitute, to be between jobs instead of to be unemployed, senior citizen instead of old person, underserved neighborhood or underserved population instead of the poor, or an impoverished, needy neighborhood.
Further examples: economically disadvantaged instead of poor; temporary negative cash flow instead of broke; enhanced interrogation methods instead of torture; collateral damage instead of civilian deaths.
About George Carlin.