For much of the 18th and 19th century and first half of the 20th century national debt was a far higher proportion of GDP than it is now.I don't understand why investment of £1 in the public sector equals £1.70 and where is the evidence of this? We currently have one of the greatest GDP debts ever
As far as I can see the fiscal multiplier is something that is argued a lot by economists but most agree that its effect and size depends on the current economic circumstances.
I disagree that wealth generation has nothing to do with your bins being taken out a country that cannot keep itself clean and tidy will create less wealth. Even on a simple level like tourism.