I used to work for a mental health organisation (part of the NHS) and I did all our finance work.
We weren't a clinical team but more an education team, we sat between the Department of Health and the Trusts who deliver care to the public and we educated them on how we wanted MH services to look and be rolled out, long before MH became 'fashionable'.
Amongst other things we produced official documents and ran conferences, which can be expensive but we justified every penny.
Knowing we were spending public money I was always conscious of making sure we got the best value possible. In the 11yrs I was there we never once received a Freedom of Information request but I knew that anyone could ask what we spent or cash on, so I was rigorous with recording exactly what we'd spent and could tell anyone anything from how many pens/pencils we'd bought in a year, why and how much each one cost, through to the breakdown of costings for any given conference or even staffing costs because I was aware that anyone could ask at any time.
Every organisation, public or private, has rules governing how money is spent, tendering processes, specific people with authority to sign off on purchased, 3 quotes system etc and as much as I didn't have the final say in these things I was heavily involved and could block any purchase if our Standing Financial Instructions (financial rules) were not being adhered to.
Even though I say so myself, we did a great job, I know this because if we hadn't, MH wouldn't be getting the attention it does now, but my whole team was made redundant because David Cameron said at the end of 2010 that the NHS didn't need so many 'managers' and that the trusts could run themselves. What a lot of good that was! Health authorities were disbanded and because the trusts couldn't do what the HAS had done for them, the Dept of Health had to introduce another new body to do it for them after having just paid out £millions in redundancy payments.