You say it like these are bad things.
abolish tuition fees - Assume for a minute they do want to do this. It'll cost £100 billion to wipe out existing student debt. Boris's brexit deal with cost £70 billion. I know where i'd rather that money went.
make the NHS 100% public - As it should be. Privatisation has been a massive drain on the NHS finances. Nurses on NHS contracts are quiting to work for agencies where they get paid twice as much and do much less work. Everyone is making money at every turn, cleaning, cooking, parking, office supplies, IT. There will always be involvement with the private sector, but right now it's a cash cow at the expense of patient care.
nationalise rail - When existing contracts end they don't want to renew them. The East coast mainline does perfectly well nationalised, goes to pot under private ownership. If Germany can run the buses, trains and freight in 12 European countries - why can't we use the same private/public model in the UK?
introduce rent controls - Much needed. Rent is higher than mortgages, houses are being bought regularly to be put on rent, prices are driven up by this, forcing more people to rent and less to buy. We also need controls on rogue landlords.
abolish Trident - Not to eager on this personally. A nuclear detterent is probably still useful. We'd be much safer though if we took the Scandanavian approach to foreign policy though - rather than the dreams of empire. Trident isn't going to keep the Russians at bay if they wanted to invade, we don't have enough bombs to wipe out Russia, whereas they do. The MAD doctrine doesn't apply. Seems wiser to invest in the navy, airforce, army, a military cyber wing and invest in missile defence or hypersonic missiles - rather than trident.
limit capitalism - You mean ask them to pay taxes just like you and i do? Or prevent them from behaving in the manner that caused the global financial crash of 2008?
jizz money all over every single public service. - Public services? Who needs them. If we'd all just die at our desks it'd be much more cost effective.
It depends on your viewpoint of course.
Abolishing tuition fees for example would be a tax cut for the upper and middle classes who attend university to a far higher degree, paid for by poorer people who don't. If the children of the upper and middle classes deserve a £50k tax bung then poorer people who don't attend university should have access to the same money in their banks. I'd prefer to give £50k to a trainee plumber to invest in his new business than £50k to an Oxford undergraduate who's just finished his studies at Eton (however there isn't the finances to do either).
Rent controls likewise incentivise landlords to allow their properties to fall into disrepair, as if you limit the price they can charge the only way for them to maintain profit it to reduce maintenance costs. This makes rent control counterproductive as you end up having worse housing for poor people. It also actively increases rent over time (see
@EwanI Ted post above).
In terms of capitalism I was referring to (amongst other things) forcing companies into allowing potentially unqualified employees to sit on boards, as well as the seizing of private assets etc (although I'd argue US government's negligence in the financial crisis was more important than any single bank).
Abolishing Trident is self evidently stupid given the current geopolitical landscape.
In terms of public services we're currently running a budget deficit and yet have every single department saying they're underfunded. Benefits, Pensions, NHS, Social Care, Police, Fire Service, Defence, Education, Public Sector pay, Local Authority... How can literally every department be underfunded but at the same time we're spending more than we earn? What we earn is also at a record peacetime high as a % of GDP, so we're also taxing more than ever before. So we have highest ever tax take combined with a budget deficit, but we're still not spending enough? To me that's an oxymoron.
In terms of the NHS some private providers are proven to be more effective, cheaper and more efficient than the NHS. Are they really saying we should ban Great Ormond Street for example, or Lloyds Pharmacy, or Specsavers? This is a problem I have with policies based on gimmicks rather than evidence. The same is truth of Johnson's 20,000 police pledge... The police could absolutely use the £1b it would cost but let them decide where to spend it (spoiler alert: it would not be 20,000 new officers).
Labour conference this year was in Caroline Lucas' constituency and I saw lots of Momentum activists in 'Labour Green New Deal' t-shirts.
Makes sense. I'd imagine the Labour manifesto will have a flagship green policy which will render the Green party superfluous.