Certainly, if the entire UK preserved railway fleet were a single museum collection, there would be scope to "de-accession" a lot of items! For me, the big worry is that most "railway" enthusiasts are really locomotive enthusiasts. Everybody always wants more locomotives but there is less willingness to invest in other areas which are equally essential. Far too many beautiful pre-1948 carriages, for example, are still rotting away in sidings while people invest in new-build schemes which, unless they can dramatically increase their rate of income, are never likely to come to fruition. This is not to say that there is no place for new builds, but I nevertheless fear that ultimately a lot of money will be thrown away on unsuccessful schemes, which could have been better spent elsewhere.