But there has also been a significant increase in the efficiency...

But there has also been a significant increase in the efficiency of their collections team as evidenced by the below extract.

^{ The average collection rate per staff hour has increased a further 22% in fiscal year 2018, on top of the 40% improvement captured in FY17.}

So money spent on better quality PDLs and better trained collection officers can only result in an improvement in EPS and ROE.

Without putting words in Rivas mouth I'd suggest he is more about efficiency of the business at this stage as opposed to actually growing it. I think first step, get the business running super efficiently and once its running like a well oiled machine so boosting the purchases of PDLs again.