"Liberal guilt" is an expression used by conservatives in the US whenever they oppose something positive which liberals do.

Affordable Health Care, for example, will mean that millions of Americans, including myself, will finally be able to see a doctor after going for years without health insurance because it was too expensive. Congress and the President are "exempted" not because AHC is a bad thing, but because they already have the highest level of coverage available as a benefit of their position.

People also refer to "liberal guilt" as a kind of misplaced kindness. For example, if a liberal man helps his son-in-law out financially, instead of spending the money on feeding starving people in Africa or housing the homeless or other so-called "liberal" concerns.