If you live in the US: https://www.usaspending.gov/

If not, search for a “your country budget breakdown”. Most democratic nations will have a similar publication.

My take after looking it over, it’s boring. We spend money on medical care, defense, and interest payments. That’s where most all of the money goes. The benefits we receive from that money are things we completely take for granted, it’s easy to not notice them but you sure would notice if it stopped.

your username suggests you're in the UK.

So a) you already get a breakdown of NI contributions etc in you paystub and you can further check this on HMRC

and b) the house of Commons publishes everything tax related here: https://commonslibrary.parliament.uk/topic/economy-business/work-incomes/tax/

and c) there is Wall to Wall coverage of the budget every year, highlighted by the traditional annual photos of the chancellor of the exchequer and his red briefcase, in mid March when the tax year ends

In Australia we get a receipt with our tax return that breaks down exactly where our tax dollars went. The same happens in France if I remember correctly, it’s pretty cool to see it and puts some of the spending into perspective

Sure that's not unreasonable to want.