£10m seems excessive for the players wwhose contract will expire at the end of the season.
Forsyth - £200k signing in 2013, so little impact when released. likely £10-15k pw.
Huddlestone - £2m signing. Small P&S impact when released. c£25k pw
Bennett - Academy graduate, so little P&S impact when released. Low £1,000's pw.
Anya - £4m signing and a big impact on P&S when released. c£30k pw.
Martin - Free transfer, so little impact when released. c£40k pw.
The worst case being what ever it costs to wipe out the amortisation remaining, will be balanced out by reduced wages. This also ignores the reduction in wages over the past 2 years, estimated to be £10m lower since the 17/18 season ended.
In the case of Derby (club statement), the EFL Executive was involved in all stages of the stadium sale, as well as giving approval and signing it off in writing. The EFL also gave us written approval for the use of our amortisation policy.
At the moment clubs with parachute payments seem to spend that money in the hope of going up before the tap's turned off. Once one of these club's is heavily punished, I expect the attitude of relegated clubs to change.
Stoke are the ones to watch as they need to offload the high earners to reduce their spend on wages. But, at the same time, they can't sell anyone without making a loss on them, and harming their P&S results in the process. It's why they've loaned so many out rather than selling them. Instead of selling them for a bit of cash, P&S actually encourages them to do otherwise... that sounds like the opposite to what P&S is supposed to achieve.
See my reply to the second quote above.