Liverpool have agreed a deal for Alisson apparently £66.8 million
https://www.bbc.co.uk/sport/football/44874142
Why can't he be attributed, he did it at Dortmund and now it's happening at Liverpool as well, it didn't happen before he arrived so much, Liverpool are a differerent team to the one they were before he arrived, both in terms of quality of play and quality of personnel and this can definitely be attributed to him, he's the guy that wasn't there before this change.
You mention blunders, but if anything this shows how much Liverpool have been willing to spend, all this without CL football, so the argument we can't spend 60 million on a keeper surely can't be right if we've had a much greater income than them? Besides we're talking about since Klopp came in and it seems to me that he's largely got it right so far with the transfer policy.
I don't agree about the Liverpool signings, Van Dijk was touted as a top notch talent, would have been happy to sign him, Mane was already very highly rated from his performances in England, you argued earlier that a striker cost megabucks and yet Liverpool signed Salah for a decent amount and have repeatedly found top strikers for what wouldn't be deemed as megamoney.
I do agree about the faith, Klopp arrived with a great reputation from Dortmund, but Liverpool have backed him 100% and he's repaid their faith IMO, Emery of course doesn't come with the same reputation but that doesn't mean the board can't see a good signing when they see one and Oblak is top notch, just like De Gea is, top keepers ted to remain top keepers until they get older, the cost per year would be relatively little, just as it has been with all the younger players who got signed for big money at the time, Rio Ferdinand seem to be a huge amount at 30 million at the time, but in terms of value for money he turned out great as he was top class for Man U for years, I think age of a plyer and how many years you'll get out of him plays a big part (which is why I guess signing Aubameyang despite his undoubted qualities was probably stranger, he'll probably only be at the top for a few more years, so per year would have cost a lot).
Yes of course it would be wise, but most of these clubs also spend big on players when they need someone in a certain position, they don't wait for someone woth 10-20 million to come good, whether we discover those players remains to be seen, you'd hope so but there's certainly no guarantee, so far we haven't signed many younger players so right now it seems unlikely.