This is not a national issue, it is a world issue. The UK has literal royalty living in vast palaces, while 21,000 people die of starvation each day in this world.
And even if everyone if the worldwide standard of living could be raised to the point that the poorest person in the world still got enough to eat and live a reasonably comfortable life, it still would not justify the capitalist system. The ruling class have no right to the resources they stole from the commons.