Aside from being a widow, I presume that we're talking about dudes not fulfilling parental responsibilities?
Women fuck scumbags, let themselves get pregnant by scumbags, then cry that said scumbags are scumbags?
How is this a problem with men? Stop fucking low-quality dudes, dudes will work harder to increase their market appeal. Women being easy and fucking low-quality, low-status dudes makes dudes worse.
Low-quality dudes are a symptom of low-quality women, not a cause.