I listened to the entirety of Jeremy Corbyn's Labour Party Conference speech so that I could summarise it for you here. It wasn't at all jejune - quite inspiring in fact.
Here's a super-condensed version of what he said.
We're a rich country, there's lots of spare money lying around. We will take it away from the selfish rich (e.g. Hedge Funds) and use it to improve the lot of poor and oppressed people. The state will build enough council houses, organise egalitarian education under local council control and put resources into an NHS purified from private sector involvement. In all cases, people will be put before profit.Corbyn speaks with genuine moral outrage and clearly hates the evil Tories, blamed for all the (entirely avoidable) evils of the age.
I think this message will resonate with young people.