"Should" ?? ... Globally ?? -- Are you saying you want a global system in place sufficient to track all government spending and taxing ? Any globally controlling agency with sufficient power to track all spending and taxing by all governments is a global agency sufficiently powerful to enslave humanity.
LOL. Do i want a "Big Bro Global Fascist Police State" enslaving the entire planet. Not quite. How about all public funds being totally and accurately accountable so there will be no more statements such as " we can't account for $2.3 trillion dollars of pentagon expenditure". No more government waste of public funds etc. Imho public funds are being syphoned off into black projects etc. This needs to stop. The only way is to be able to accurately account for all government spending and revenue collection WITHOUT a 1984 Orwellian scenario. I don't think that you have to have the global enslavement of humanity to be able hold the system of government accountable.