If you are the custodial parent, it is likely that you are currently receiving some form of child support. Child support calculations are primarily based on the non-custodial parent's income at the time of filing. But while their income is likely to change frequently, the child support order will only be subject to change above inflation if a modification is filed.
If you have gone through a divorce as a parent in the state of California, it is likely that you now have a child custody order, and consequentially, a child support order in place. The child support order will have been made in order to ensure that both parents are contributing toward giving their child the best possible quality of life based on their incomes.