We've still got the war on drugs, in the UK. If that was ceased, there would be savings of around 5B (conservatively, from what I've seen).
It, mainly, fucks two lots of people;
1) Those caught up in the "war". 2) Those who would otherwise have the money spent on them (broadly, the disadvantaged).
Note, those two sets don't make up the majority, and have the least ability to enact change.
I think it's fair to characterise democracy as two foxes and a hen voting on what's for dinner!