The trustee shall immediately upon receipt of such salary, wages, or income, or at such other time as the court may direct, disburse the funds as follows:
1. The trustee shall first pay to the debtor directly, or for his benefit as the court may direct, any amount the debtor may be entitled to as exempt by law if he is a householder and head of a family or, if he is not a householder or head of a family, then such amount for the necessities of life as may be agreed upon by the creditors in the assignment. Nothing in this subdivision shall prevent the trustee from paying to the debtor a greater amount than is exempt by law if agreed to by the creditors and approved by the court.
2. The trustee shall next pay, according to such funds as he has in his possession, a pro rata share of the balance to all the creditors on an equal basis or in such proportions as the creditors may agree.