24601 has made some good points. Back in the day when the two CU's with which I was involved in their early stages of getting off the ground, we begged members to buy more shares in order to meet the demand of loan applications. We asked that family members of our membership would take out Share Accounts. We wanted our clients to leave the loans go full distance and not to repay early. Also, we begged people receiving loans to maintain their shares and add where possible. Like I said earlier, we hadn't a clue in such practice. Simply, we couldn't match the amount of loans with the demand.
I could write reams about the huge amount of people depending on illegal and legal money lenders then. To say the least it was frightening and I'm not going to post the details as some on here would see it as mere "propaganda." However, I will say I received many threats from illegal money lenders including one as I exited church one Sunday morning from who I regarded as Cork's greatest hypocrite. Illegal moneylending was such a problem back in the 1970's that we formed a cute plan for our CU members in repaying illegal money lenders simultaneously, ensuring no more illegal loans were accepted or sometimes even offered.
CU's do not have cheap interest rates, but interest is added only to the amount unpaid on the Principle, so interest reduces as you pay. I say this as many are not aware of such practice.