The British aristocracy largely became toothless and irrelevant by the end of the second world war. Industrialization meant that most aristocratic estates became loss projects and real financial power went to the newly minted industrialists and bankers.

The aristocrats held political and military power in the 19th century but the gradual democratization of Britain eroded that too. When everyone could vote and had equality before the law, their political power dissipated as well. Politics then became a matter of money and media. If you had money, you could campaign more, buy more publicity and maintain more full time politicians.

As Spengler noted, the parties were completely beholden to the moneyed men. Plus, the plutocrats owned the media and entertainment industries, so they decided the course of mass culture and made and unmade politicians.

The aristocracy was relevant in the 19th century, it stopped being so by the 1920s. It even stopped staffing the military as bulk of the officers came from the middle classes.

A lot of people on the right like Spencer and BAP love to fawn over the European aristocracy, but the sad truth is that their demise became inevitable with the advent of the musket and the steam engine. The musket ended the nobility's military monopoly and industrialization broke their grip on wealth.

I think that was the reason why Britain fell to the Jews ultimately. Its democratic nature allowed Jewish bankers to slowly buy into the political-governmental establishment and seize control of it. Churchil for example was completely indebted to the Rothschild family and was essentially their manservant.

That's why he kept making a comeback despite his numerous failures and disasters: the Gallipoli campaign, the black and tans, returning Britain to the gold standard and prolonging the depression etc.

On a larger point, in the modern age, a plutocratic elite is inevitable if your country is democratic and liberal. They'll simply buy up the parties and beguile the population with their media and entertainment propaganda.

The only way to avoid the rule of the merchant is to be an authoritarian socialist/state-controlled economy like China, Russia, or Iran. There, the rulers of the country are the military-intelligence guys(Russia's siloviks) and technocrats(CCP).

They may be corrupt and sometimes despotic, but unlike the merchant, their power is tied to the fate of the country.