Ironically, that statement is true of the large segments of the US middle class whose standards of living are considerably higher than those of ghetto dwellers.
This also brings to mind the situation in South Africa where Blacks, albeit desperately poor and completely ignored by the apartheid welfare state (before transition to democracy) did not succumb to "culture of poverty" but developed a high level of self-reliance and informal support networks. It is not uncommon in Pretoria to see white panhandlers while blacks engage in small-scale trade activities to support themselves.
This seems to suggest that poverty alone is not a sufficient or even necessary condition to produce the "culture of poverty" - another ingredient seems to be involved. That ingredient seem to be the institution of paternalistic clientelism - the ruling class/elite preserving the status quo and buying social peace by patronizing and bribing the subordinate classes. This explains why poor Blacks in South Africa did not develop "culture of poverty" (absence of paternalistic clientelism) while the much wealthier US middle class as well as the ghetto dwellers did (they are, after all, clients of the US ruling elite).
Wojtek