It's really very simple: non-married, childless employees should receive the same benefits that married employees with children receive. Those who choose a different route in life should not be penalized for their choices.
Why should employee X have to work 2 hours later than employee Y simply because employee Y needs to go to a baseball game with her child? Employee Y made a decision when she chose to have children, just as employee X made a decision when she chose not to have children. Their choices should not induce a disparity in treatment.
Of course I am empathize with working parents and they should receive time-off if needed to spend time with their children, since doing so promotes the welfare of our nation's children. However, working employees without children should receive the same amount of time, if he or she so desires.
Ryan.