Racism? Webster's definition[0] of ghetto (and that of any other respectable dictionary) makes no reference to any particular race. Would the phrase "the poor man's solution is to run strings" also be racist, by your logic?
[0] a part of a city in which members of a particular group or race live usually in poor conditions; the poorest part of a city
In the US for the past many decades the word "ghetto" has referred to qualities associated with poor urban american neighborhoods, specifically black neighborhoods, and only has a historical connection to jewish ghettos.
[0] a part of a city in which members of a particular group or race live usually in poor conditions; the poorest part of a city