I'm afraid to break it to you but 60% of all UK welfare spending goes on the retired. Only 40% goes on those of working age and most of that is to top up the incomes of those in work in one way or another. Very very little goes to the long term unemployed or similar.
In large part the current issues facing the UK derive from the fact that the UK keeps throwing ever more money at the old (inflating asset values, ever increasing health care spending, inflating welfare spending on the old) while leaving the rest of society to rot. A country doesn't become rich or stay rich by continually throwing more largess at the old who consume but don't produce, and by pandering to this groups interests. It kills economic growth, kills innovation, kills productivity growth, and causes economic stagnation such as the UK is seeing. Gerontocracies never thrive.