There are only two ways that money gets into the economy, by foreign earnings and by money issued by the government, either directly by government spending, or by banks, under licence from the government, issuing loans.
We can discount the foreign earnings because we import more from other countries than we export to them (so money is actually leaving the UK, the old 'balance of payments' problem).
Money issued by the banks, while it circulates to some extent in the economy by businesses buying resources and paying their employees, is ultimately repaid by the borrower but the borrower pays interest on it, usually at above inflation rates, so it contribute only to bank profits (and banks most emphatically do not use this money to make more loans) . So 'bank money' is ultimately lost to the economy.
Which leaves us with government issued money by way of government spending. Some of this returns to the government by way of taxation, but as government procurement uses private enterprise, which uses its profits to pay dividends and to remunerate its higher management, who, tend to save their money rather than spend it (marginal propensity to spend, economists call it) a significant amount is not recovered via taxation.
What is more, the already wealthy recipients of share dividends and high wages 'invest' their money in interest bearing instruments which pay above inflation interest, and are frequently more lightly taxed than income subject to PAYE. It is found that, although taxation is more or less progressive, from the 95th percentile on the very wealthiest are taxed far less than the rest of the population. This holds true across most developed Western economies
There have been growing calls for a tax on extreme wealth, one proposal is highlighted in this blog by economist Simon Wren Lewis.
mainlymacro.blogspot.com/2025/
In the meantime, as this report from the Resolution foundation Think Tank a (centrist organisation) shows, there has been little growth in wages and the RF predict that, under current economic conditions, this will persist, with the lowest percentiles losing out the most. They actually predict zero growth over the decade.
www.resolutionfoundation.org/app/uploads/2025/06/LivingStandardsOutlook2025.pdf
The UK is currently held to be experiencing a high rate of taxation. Given the cost of living increases of recent years, and those projected for the future (higher utility bills, high interest rates on mortgages) and that the amount of private debt is rising People in the UK owed £1,900.3 billion at the end of April 2025. This is up by £48.7 billion from £1,851.6 billion at the end of April 2024, an extra £898 per UK adult over the year. ( themoneycharity.org.uk/media/June-2025-Money-Statistics.pdf ) can government really propose extracting more money by way of taxation from the general populace?
It seems to me that the only options open to the government for increasing the tax take are to tax the super wealthy and/or to put more money into the economy, but in such a way that it will reach the pockets of those who will actually spend it into the economy (which will lead to growth).
Current government moves to remove money from the economy by way of cuts to public spending and cuts to welfare spending are just economically ludicrous and, frankly, a political death wish.