Absolutely willing to pay for this. What % of the budget goes to that? Do I need to accept everything else to get this service or can I just whitelist this line item?
It's a bundled deal, sorry. It's not just governments that avoid admin overheads - no auto insurance I know will let you pick which specific impacts to insure against a la carte, just to reduce your premiums.
Also, no 2 people will ever agree on the same government spend (to the nearest million), so I don't see the point of your exercise to personally quantify how ones tax dollars should be directed. The point of having a representative government is so that individual citizens don't need referendum on how much to pay for toilet paper at an USAF base in Japan, or disease reconnaissance in central Africa - but both things benefit US citizens (broadly speaking) and need to be done, so congress allocates the money.
And this is why Trump turned it all off. The bundled deal is not working for too many voters. They want Trump to negotiate a new deal on their behalf.
I am certain they'll get the deal they deserve. For every complex problem, there is an answer that is clear, simple, and wrong