Furthermore, much of the justice system is not criminal: there’s also the civil side to be considered.
I pulled some budget trend data of the US Department of Justice from the internet, for 2002. I don’t know whether the qualitative categories include judges: I’m pretty sure they include attorneys. State and local isn’t included, nor are private litigation costs. The data is suggestive and probably misleading in some ways: caveat lector:
2002 Federal Department of Justice Budget, selected line items ($millions)
Criminal 128
Tax 75
Civil 170
Environment, Including Superfund 100
Civil Rights 101
Anti-trust 131
To comprehensively address the OP, each category needs to be considered separately. List does not include budgeting for immigration and naturalization, and I’m not sure whether it excludes “Interagency Crime and Drug Enforcement”. It probably excludes Customs Service and Bureau of Alcohol, Tobacco and Firearms, which are part of the Treasury Department. I’m not even clear whether the above figures include the Judiciary: I would guess no.
So the OP’s question as stated isn’t just about criminal justice.
The OP does ask for some question framing: “On what basis should we compare the legal systems of two countries?”
I wondered about the Netherlands and learned this from wikipedia, emphasis added:
The court system follows the traditional hierarchical pattern. It is largely based on that of France: the state rather than the individual initiates legal proceedings and Administrative justice is dealt with separately from civil or criminal justice. In the Netherlands, there is also no jury system. The judiciary is independent and judges can only be removed from office for malfeasance or incapacity.
Stay out of trouble
I found a citation by a law professor from Gresham College in Central London: Which is better: adversarial or inquisitorial?.
My observations/editorializing:
- The Brits tend to spend about 15 times more on legal aid than continental Europeans. In Britain, cost of defense is about 5 times the cost of prosecution: in Europe cost of defense is a quarter that of prosecution.
- The Brits tend to have higher incarceration rates and lower conviction rates…
- …according to a study that’s 20 years old and overtaken by recent developments.
- Reports of aggressive police questioning are met with a Gallic shrug in France, relative to Britain.
- IOW, most studies of the inquisitorial system focus on France, which conflates cultural factors specific to that country.
I’m not sure why Scotland has so many public prosecutors: