To say we have feudalism or even a workable "skeleton" aristocracy waiting for capitalism to die is a little over the top. I would never work because we are the least revolutionary people on earth.
The British monarchy was tamed in the 17th century, and is now almost completely toothless. The aristocracy is pretty much finished as a ruling class, and has been for the past century or more. Remnants of feudalism still exist in British society, and likely always will, but only as quaint fossils strung together with bits of wire in museums. The British working class are indeed still being exploited and oppressed, but not by monarchs or aristos.
As for the supposed lack of revolutionary spirit in the British people, it certainly didn't seem that way in the 17th century. The trauma of the Civil War, combined with the phlegmatic pragmatism of the British people, meant that the British have emphasised continuity and gradual evolution rather than revolutionary transformation over the past three or four centuries. It's not that we're not potentially a revolutionary people (we have demonstrated the opposite tendency in the past), it's that we're not an
excitable people. Rabble rousers don't tend to get very far in Britain.
"Politics is the art of looking for trouble, finding it everywhere, diagnosing it incorrectly and applying the wrong remedies." - Marx (Groucho)