it is quite elementary:
An advanced western economy, facing relative technological and demographic decline, should not be spending more than 40% of GDP lest it do serious damage to the long-term growth rate that will preserve the standard of living we enjoy for our children too:
http://ime.bg/uploads/OptimalSizeOfGovernment.pdf
If we accept that spending can fluctuate around 7%must look to spend just 33% of GDP at its peak, with a median value of no more than 36%.............. like we achieved in the nineties.
So to a degree we are going to have to get used to the idea of government doing less for us because having a public debt equivalent to 400% of GDP by 2040, and using 15% of GDP each year to service debt interest, is clearly not a happy future:
http://www.bis.org/publ/work300.pdf
so, if you cannot achieve everything you might like the state to do within a 'mere' 36% of GDP accept that it will do less, otherwise we will destroy the long-term growth that will preserve the standard of living we enjoy today for our children tomorrow.
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