I don't see how this math works. Lets say my total annual income is $5000 to keep the math easy. My spending looks like this:
get $5000 paycheck (for the sake of ease of math)
spend $3000 on rent
spend $500 on lottery tickets
spend $1000 on food
spend $500 on tobacco
Now I have a $500 bill that I don't have the money for.
Conversely I could:
get $5000 paycheck
spend $3000 on rent
spend $1000 on food
Now I have a $500 bill that I can cover because I did not buy all those lottery tickets.