I know you are really busy at the moment, trying to find ways to save costs in increase income an' stuff, so I thought I'd suggest a really brave solution to some of your problems:
Legalise and control prostitution as well as the use and distribution of drugs.
Let's face it, we already tax some terribly addictive and potentially damaging drugs, so why not tax those things that we have manifestly failed to control, and which cost us a fortune by way of (failed) policing, court and prison costs and all the social services costs - never mind the human misery and healthcare issues.
Similarly we will never eliminate prostitution. Lets take it from underground and put it above board, to the benefit of the sex workers (male and female) as well as the clients. And it is well known that regularly de-spunked males are a lot less aggressive!
We can raise taxes from all elements of these enterprises, to the great benefit of the exchequer, with reduced costs to the NHS and vastly reduced policing costs. And you will find jobs in administrating these initiatives for some of the civil servants who you otherwise would have to be sacking (and paying sodding big severance payments)
Just a thought
Peace!
Ken