The 'Irish Blood, English Heart' singer posted a lengthy message on True To You on why he opposes the tribute concert and parades to mark Queen Elizabeth II's 60th year on the throne.
"This week, the Queen's Diamond Jubilee presents a new lesson in the force of tyranny, and is an expression of loathing and abhorrence of the British poor - and all done, quite naturally, at the public's expense! It is degrading to anyone of intelligence," Morrissey insisted.
His message continued: "While dictatorships throughout the Middle East are gently condemned by the British government, there is no examination of the extremism enforced by the British 'royals', who remain the most overpaid and most utterly useless people on the planet. Having done nothing to earn our respect, they demand everything by return.
"It is a cunning and extravagant form of benefit fraud. I should mention that I am frequently asked to appear on BBC television's Question Time to air my views. But is it possible to engage with the British media and not be carved up? I doubt it. Meanwhile, somewhere else, far away from tabloid Britain, the moon retains its friendly silence, and the world is all before you."
Photo gallery - Diamond Jubilee Concert
Copyright: PA Images
Morrissey has famously spoken out against Queen Elizabeth II in the past, including his 2010 campaign to convince the royal and her guards to stop wearing fur hats.
"It is difficult not to look to the Queen herself - after all, they are her guards, and she must surely be aware of the horrific process utilised to supply real bearskins for her guards," he said at the time.
"The mere sight of each bearskin hat must surely jab at the Queen's heart."
He also titled one of The Smiths' hit albums The Queen is Dead.
Watch Morrissey perform 'The Queen is Dead' below: