I don't know. I go back and forth on this. Chappelle put it best, if she can legally kill it (in some states after yesterday's news), then men should legally be able to recuse themselves from all financial obligations related to that child if she chooses to keep it. There's a level of hyporisy that comes with "my body my choice" when the man has no say-so in the matter before birth, and no say-so financially afterwards.
At the same time though, lets say hypothetically the law changed tomorrow and men were no longer mandated to pay child support. A whole lot of mothers if not most are going to need assistance. Who is that gonna fall onto? The government. Principally speaking I have an issue with tax dollars being substituted because some men are too irresponsible with who they lay with, and so moralliy deficient that they wont take care of their seed.