There have always been the 'haves' and the 'have nots'. Probably Jesus was right when he said that there would always be poor people. Liberal democracies, in general, have tried to put into place systems where the worst depths of poverty are avoided. People, even the poorest in Britain, generally, have roof over their heads, can get a square meal and even have just enough to socialise a bit. Though there may be many things wrong with our system, it could be a lot worse.
Having said that, it is getting increasingly worse, and there seems little that democracy can do about it. Who can you vote for whose policy manifesto states that they will decrease the gap betwen the richest and the poorest? Who could you trust to do it even if it was in their manifesto?
Rich, powerful individuals control our media, our governments and therfore our votes and our futures. In any case, in Britain, we don't live in a democracy. The First Past The Post System ensures that no new party will rise to power, that no new ideaology can gather momentum. A new party gaining the popular support of, say, 10% accross the country, is unlikely to get a single seat in government. The rich want it thus. The existing politicians want it thus, and therefore it wil be thus, regardless of what is fair, regardless of what people think.