Debt

I am a newbie to this game, and totally hooked, but am unable to proceed because I can't manage my debts.

I have read a lot of discussions and watched many videos, and what I understand, debt is incurred through the life support requirements

(power, food, oxygen, fuel) I hold balances of all and the input is positive (greater than demand), but still my debt increases.

 I am stuck with this problem at the "Proof of Employment" learning stage. What am I missing? Any help would be much appreciated