Freedom from want? Impossible. Want forever exists.
Freedom from ignorance? Ignorance comes almost entirely from one's choosing.
Freedom from squalor? Not if it is paid by other people, by force.
Freedom from idleness? Again, idleness is one's choice.
OK, I should have explained this... the four great giants were first set out in a report on the poor written in the 1940's those words have different meanings now to what they did then.....

Want: Should really be read as "Need" and more specifically basic need like food, shelter etc. Yes, need will forever exist but I don't think this is a reason for us to sit back and not do anything
Ignorance: Meant lack of education making someone unemployable, also meant those with learning difficulties or disabilities, there was no such thing as PC in those days.
Squallor: This word hasn't changed, I feel that the well off have an obligation to help those living in squallor, and the majority electing a party that agrees with these principles is the closest we can get to consent. Its not like we can take certain people out of paying taxes because they didn't vote for the man in charge
Idleness: This is a tough one to explain, it basically means that we should encourage the poor to work rather than sit around, its a way of making sure they don't scrounge, this is why welfare is buttons compared to a proper wedge and you have to prove you're looking for work before you claim it.

And I'd also like to jump in on the "America saved us in WW2 thing", I suppose it depends on your perspective, America did sod all in WW1, but its unlikely we would have won WW2 without their help. However, they did not help us in the way many people seem to think, their biggest contribution was a load of money and pilots to help us out in the battle of britain. And their intervention was not some big moral crusade against Hitler, America were reluctant to get involved in Europe (can you blame them?), there was actually a lot of libs campaigning in favour of intervention which is quite weird (see Charlie Chaplin's "The Great Dictator"), remember it was Hitler who declared war on the US, not the other way round. So yes American did help us out a lot in WW2, but thats no need for Americans to keep bringing it up as a reason why we should support every action they take.