It's a privately owned building, so I'm not sure what imposing a wealth tax on anyone would accomplish. The only royal or slim government connection it has is in it's name.
It's run by a charity, and owned by it's patrons, so you'd be forcing the wealthy to "donate" to a privately owned enterprise via a wealth tax, to fund other wealthy people's private investments/hobbies.
I'm only questioning why it should get help from people who have no connections or interest in the place, based solely on their income. People are voting with their wallets & staying away from theatres, cinemas, etc.
The gov't stepping in to help is only going to involve them in the arts, which I guess is okay, but sounds a bit ominous.
Strange this, or possibly not, I have been providing alot of kit via sub contractors on the Albert Hall, there has been a lot of work going on over the past year. not sure everyone on site is getting things right, companies, (Big companies) going bust working on this project as well. So i would assume from client down the line people have been losing money hand over fist