Silly McSilly Face
Wilson Palacios
If you do that you'll simply hit the attractiveness of the investment industry in the UK, which generates huge amounts of revenue for the government. And this goes to a wider point around the complications of the tax system and a lack of transparency around the interconnected workings of it.Tax capital gain at the same rate as income tax (18% to 40%) and clamp down on the use of trust funds to reduce income tax avoidance for starters.
You mention taxing big business for example, but corporation tax is particularly sensitive to "laffer curve" as it is a tax on profit and businesses can choose not to report as much profit (basically a higher corporation tax rate encourages use of non-taxable gross profit for investment and a lower corporation tax rate encourages a greater use for net profit and distribution to investors/shareholders). Corporation tax revenues therefore tend to rise with lower rates, and fall with higher rates. But these rises and falls may lead to rises and falls elsewhere within the tax system as the economic activity is encouraged to shift elsewhere.
And so people have got to stop seeing taxation as a method to raise money and more as a method of controlling economic activity (lower taxes effectively mean there's more money in the economy and more economic activity and this may lead to more tax revenue overall. Governments have been raising taxes recently to take money out of the economy and stop people and businesses spending to push down on inflationary pressures but for example the employer's NI raise has led to falling recruitment and investment/expansion plans and that has started to impact on government revenue already - hence the "£15 billion black hole" thats been created).