> When your net worth is too risky (for your personality) get more tight.
> When you feel comfortable with your number you can loosen up a bit.
I don't feel inclined to try this method. You've basically described how every highschooler manages their wallet. The system falls apart (or turns into a budget) the moment you have a single problem to solve.
Example. I have $10,000 in my checking account and a $15,000 car loan, so my net worth is -$5,000. Either I don't buy groceries this month, or I admit that I need to know more than my net worth to make financial decisions.