Here's how it makes sense:
You have an FO who takes home 75 hours each month for sitting on reserve at say $80/hr, but only flies 10 hours each month which was originally open time. So he ends up getting paid for 65 more hours.
Now, let's assume a line holder FO is there pick up that open, and you pay him $120/hr to fly those 10 hours of open.
$80/hr x 75 hrs = $6000
$120/hr x 10 hrs = $1200
You eliminate the number of reserves, put loads of open time up there for grabs, the top end people are happy, as they get more cash, the company ends up saving money, and junior folks get furloughed. The only thing that can stop that is people not picking up open time, or contractual cap like we have.
That's why I'm glad we don't get paid over 80 hours, so there's no incentive to fly any opens, and screw junior people out of jobs. Great job protection for us junior folks!