Showing my ignorance, but I didn't even realise that tax revenue from a certain stream (e.g., fuel tax) went directly to the government department (e.g., DfT) t

Showing my ignorance, but I didn't even realise that tax revenue from a certain stream (e.g., fuel tax) went directly to the government department (e.g., DfT) that instigated it, rather than it being absorbed centrally by the treasury and then redistributed according to fiscal policy. That's interesting. Doesn't that mean that certain departments will be more flush with cash simply by virtue of attracting more tax? (...and, yes, it's upsetting that this happened in real life.)