I thought it was a bit more cut and dry than that. If a dad loses his job, and goes back to child support court, he would get a cut in child support, but also be ordered to actively search for a job. So if dad has to get a job making minimum wage, then the courts would simply impute that amount.
I do know my ex took our case back to cs court way back...he took a lesser paying job (all jobs through his family so oh well)...and the courts were totally fine with imputing his new wage.
Per dads' request, they also imputed my pt income as a housecleaner to full time. Even though I have had doctors notes (at this court date I did not have a current enough one...it was over six months old...and my doctor did not specify exactly what she meant by I should work only pt due to numerous back injuries)so that I am imputed at way more than I actually make.
One thing I have never understood about child support is that they do not calculate how much of a mortgage or rent one pays. One friend has got in a major jam...his mortgage went up...he was working his butt off at a high stress job, no vacations, etc...his ex had moved in with a man who makes big bucks...they take luxery vacations all the time...are now contemplating putting a pool in the yard. This friend is understandably bitter...and I just don't get how come CA does not calculate into its child support imputations what money HAS to go out every month just to have a roof over the childs head?

Where I live, no one can touch a basic, no frills two bedroom house...for rent...for under $1400...and most one bedrooms are running at a minimum of $900 and up...thats if your lucky. And folks here are getting laid off like anywhere else...I clean for a living and have lost several clients the past two years due to people having to foreclose on homes, etc.
Its not good. Sorry so long.