Maybe they get to pull a pension too? There's lots of examples of Admirals and Generals who "retire", get their pension payouts, but come back as an "advisor" effectively doubling their pay.
Those are great prices. In the US we are at least double that for an equivalent system. Many solar installers/sellers here are very predatory and have been for a long time. Prices have dropped, but not by enough for it to be worth it for me.
Some of that is for good reason. Take for instance in North Carolina; a house built in the mountains in the west will have quite different standards from one built on the Outer Banks.