Why are both parents not equally responsible for the financial support of their children? I feel they should be. The issue I have with the way child support is calculated is that often the majority of financial support falls on the parent that makes the most income. If both parents have 50/50 custody, then they should share 50/50 financial support. Otherwise one parent actually ends up financially support the children while the other parent has custody of the children. Shouldn’t both parents equally financially support the children when in their custody? It’s not right that only one parent be financially held responsible for a child they both brought into world.