Spousal support (Alimony) usually only comes in to play if you make $250K or more per year and there's a large disparity between spousal incomes.
Child Support, on the other hand, is pretty standard and is based on what both parties make, who has primary custody of the child(ren), who pays for health coverage, etc. It's not uncommon for the wife to pay support if she makes more than dad and/or if dad has the kids more than mom. If the parents make the similar amounts and split the kids evenly, child support is minimal.