If there are fewer tax payers and simpler taxes it will save a lot of expenditure on bureaucracy and also invigorate the economy from the bottom up. Therefore merge Income Tax and National Insurance - its a pointless split these days.
Increase Personal Tax allowance to ensure anyone on minimum wage doesn't pay tax. Allow spouses to share allowances so parents can afford to stay home to look after their children or elderly parents etc. Family looking after the elderly in their own homes should be encouraged wherever possible and encourage multi-generational living arrangements to reduce care home and child care needs.
Simplify the tax system. Enforce IR35/stop all personal service companies etc to ensure that self-employed are paying same taxes as the employed. Tax all forms of earnings at the same rates.
Increase the tax rates for those earning higher amounts. An extra 2% on those earning over £50,000, 5% over £100,000 would not drive everyone overseas but would potentially cover the increased allowances across the board.
Reduce the tax-free lump sum that can be taken from pensions early. Too many future pensioners are cashing-in but will find themselves short of cash later on in retirement.
Increase Corporation Taxes for companies with high profits (windfall tax).
Stop tax credits and any other benefits paid to employed workers - if everyone working takes home a decent wage then they become unnecessary. Benefits should only be paid to those who are not working for genuine health reasons. Nobody in work should need to be subsidised by the Government.
Increase the VAT rate on luxury cars, yachts, flights and other expensive luxuries - the rich can afford to pay more. Call it a Green Tax - the cost of something should reflect the damage it does to the environment.
Renegotiate freedom of movement/goods and services with the EU (I have accepted that we can't reverse Brexit)
Provide free university places/write off student loans for students who become doctors, nurses, teachers, etc. providing they work in the job in the UK for a set number of years.
Stop encouraging everyone to go to university - create better apprenticeships/ training routes for non-academic careers to allow more people to learn on the job (while earning at least minimum wage not the current low level of apprenticeship wage that nobody can survive on). Our schools are too proscriptive and do not encourage enough creativity and diversity at present. Get rid of Sats tests and trust our teachers to do a good job.
Spend more on Police to combat anti-social behaviour and tackle drugs
(other than weed that should be legalised but controlled and taxed like
alcohol). Make our town centres safe again by having an increased Police
presence. Increase punishments.
Charge VAT on all highly processed food and packaging. Tackle the obesity crisis head-on by making healthy food much cheaper than processed food. Increase taxes on smoking and alcohol. Expand preventative healthcare.
Change the way our A&Es operate so that there are far more walk-in minor accident/illness facilities available at a local level to help those that don't need full emergency care and reduce pressure on GPs and A&E alike. Only those arriving by emergency ambulance or triaged by GP/minor injuries to go to A&E. Invest in the NHS but charge for services that are non essential/time-wasting/missed appointments etc. but only once there is a decent IT system in place for arranging appointments.