The wealth of the capital class is, unsurprisingly, capital - the facilities, equipment, organizational structures, etc. used to make stuff. What does it mean for capital to be hoarded?

The wealth of the "capital class", whatever that means, is dwarfed by the debt being run up by governments.

My favorite example: if you confiscated all of the wealth from all of the billionaires in the USA, it would fund the federal government for around six months. If you add state and local governments, those funds would last just weeks.

The rich don't have your money. Your government does, and they're flushing it down the toilet (and bombing Iran).

Certainly, and notably the 'capital class' that's 'hoarding' the housing he's talking about are what look like normal people. You'd make more money taxing half of the value of those who own SFHs in Santa Clara alone than you would Elon Musk - and hurt productive capacity and jobs far less. The disconnect between the desire to extract what people describe as a fair share from the 'capital class' comes up rapidly against the wall of realizing they themselves are the 'capital class' in question. Everything else then becomes a war of definition as they try to narrowly constrain the scope of this such that they can send their kids to Monta Vista while simultaneously having everyone else pay much higher taxes.

The same people crying about this "capital class" are often turning a blind eye to rampant migration and fiercely protesting against the deportation of illegal aliens. As if the laws of supply and demand have no effect on housing when it might conflict with one's liberal ideals.