Re: How?
You have got to be trolling us with a Gary "Best Trader at Citi" Stevenson video!
Rebuilding infrastructure is expensive and if the Gov't borrows too much money to fund it then the bond markets will hit them with higher interest rates which could lead to crippling inflation.
As far as taxing the rich goes, well in 2024 the top 1% of income tax payers accounted for 29% of the income tax raised. Investment income is treated differently but if not in an ISA or SIPP wrapper you are going to pay hefty taxes too. If I was still contracting I would be paying 25% corporation tax and then another 8.75% (basic rate), 33.75% (higher rate), and 39.35% (additional rate) on any dividends.
Address the core UK problem of low productivity, stop choosing cheap labour over investment in automation and the economic outlook might change.