Only in a rather crazy partnership is that the case. My child's resources and support absolutely fluctuate with my actual income, preferences, and obligations and as a compromise of financial disputes.
Recently I built a house instead of working, willfully drastically lowering my income to 0. The child had all the necessities met, but anything beyond was less plentiful than before and we had to cook frugal foods. The child was not neglected or abused so nothing illegal, but standard of living significantly lowered. It is fair that the child's standard of living lowers with the parents, but your system would have me a criminal were it I didn't have custody.
It doesn't make sense that married people can willfully lower standard of living but non custodial parents cannot. The standard should be the same uniformly but were it the case it would be voted down, thus is a case of the majority buying a sense of smug moral imposition at no cost to themselves against the evil divorcing sinners, to the great benefit of family law practices who often ruthlessly pursue it for profit.
