I'd make working more attractive. To do this, I'd make all genuine commuting to work expenses fully tax deductible at source or reclaimable, for all employees. There is a huge disparity between those who have to commute to city centres or other awkward to reach places to work and those who can work nearby their home or from home.
I'd also put inheritance tax up to near French levels, which is I believe 60% from zero. Its shocking that your prosperity in this country is far more dependant on chance of birth than hard work and parents leaving or gifting children massive deposits is one of the main drivers of high house prices.
I'd consider bringing in a flat rate of income tax. Also much cheaper to administer.
I'd crack down on quangos and the people who stay a couple of years in each one before moving onto the next, often creating a whole load of work to sort out the mess they'd make.
I'd make the NHS one of several competitive healthcare providers that people could choose, and the guaranteed provider of healthcare that people without an income would benefit from. These healthcare providers would be non profit making, as in The Netherlands.
I'd devise a modern constitution, so that we actually knew what our rights are, and so that they couldnt' be removed from us other than by special majority of 60% with referendums for matters raising certain constitutional questions, similar to Switzerland.
I'd get rid of the zoning system for new house building that promotes mass housebuilding and creates a relative monopoly situation, and require that 25% of all new builds be self build. I'd bring in tax incentives for small co-operative new developments and for redevelopment of ruined or damaged and city centre properties.
I'd reverse the tax rules on rental income so that the full mortgage interest costs can be deducted from income tax bills of individuals because this is just a driver of increased rental costs and encourages large corporations to take over high numbers of rental properties and put up rent prices with lowered standards.
I'd get rid of a number of the green initiatives brought in by Carrie Johnston, particularly the requirement of an EPC of C or more which favours new builds and isn't at all green because it makes living in older properties which have already long since paid back their own carbon footprints less desirable. Ditto with older but serviceable cars - manufacturing an entire new car to be compliant is far less environmentally friendly than continuing to drive an older but still relatively efficient car.
I'd bring in national standards for roads, including cycle paths on at least one side and on two sides for all new roads, and increase the number of pedestrian underpasses and bridges.