There's been a lot of talk lately about the gender wage gap. On Sunday, Rachel Maddow weighed in on the topic on "Meet the Press." She said that women earn only 77 cents for every dollar a man earns. Alex Castellano replied to her on the show. 

In article for Politico, Kay Hymowitz explains why women earn less – motherhood. After women have kids, they work less hours then men, they take more flexible jobs, or take years off when their children are little. Taking time off is basically a career killer. 

Hymowitz is right about the cause of the gender wage gap. Ann Crittenden covered the same territory in The Price of Motherhood: Why the Most Important Job in the World is Still the Least Valued. However, Hymowitz misses the punch line in the discussion, which is that this situation is still wrong. Parents should not be penalized in the workforce for caring for their children.