Figures

I don't know what it is about western governments and their desire to appear good by spending taxpayers money on what they deem 'worthy' projects abroad. The evidence is out there that the majority of cash given is simply siphoned off into the pockets of kleptocrats and into their pension funds in various tax havens.
Telegraph.

Britain hiked its aid spending by more than any other country in Europe last year, figures show.
Foreign aid soared by 28 per cent last year, meaning the UK hit its target of spending 0.7 per cent of GDP on overseas development.
It left Britain with the second most generous aid budget in the world, outstripped only by the United States, and it came as a series of developed nations cut back on their aid spending.
The figures will reignite concerns among Tory MPs that the aid budget is ill-directed and has ballooned at the expense of other Whitehall departments.
Britain spent £10.6 billion on official development assistance in 2013, up from £8.3 billion in 2012, according to the Organisation for Economic Co-operation and Development – a hike of 27.8 per cent.

You'll note that the MP's appear to be more concerned that spending on their departments is lagging, rather than the taxpayer is being stiffed for the bar bill so to speak. Even if we weren't spending the cash abroad, it would still end up being wasted by the government in other words.
The problem is, the government have no control over what the aid is spent on, oh they can stipulate that it must be used for stuff, but once it's out of their hands, that's it and the begging bowl is back in place with little to see for what it's been used for save a marked increase in banking funds elsewhere.
Politicians and the state are not the best people to decide what money should be spent upon, the only people who are, are ourselves. If we wish to give to charity, we should pick the charity, it really ought to be that simple. I rather suspect the government and politicians would be surprised what we spent it on... or perhaps not which is why they do it their way.
Charity begins at home and we should decide who it goes too.