If there was no discount, or one that I thought wasn't to our advantage, then I'd rather the money was in Motherwells account earning a little interest rather than someone else's account.
Take the £1.5m discussed, 60% is £900,000 giving at least 3% interest over the next 4 years which would be worth £108,000 or £27,000 per year which could be used to either pay a youth player or added to the wages offered to someone we're trying to sign which could make the difference between him signing for us or one of our rivals. This player then could possibly be sold on before the debt is due to be payed giving us more cash in the bank.
It seems crazy to me to pay off an interest free loan with money that could be working for the club.