Your solution seems to ignore the basic macro-economic identities:
(S – I) + (M – X) = (G – T)

If imports and exports stay the same, private saving must equal government deficits.

Also you seem to have a bias against public investment.

Better roads, schools, bridges, ports, power grids, internet are all public goods that can lead to increases in productivity in the future.

If they are natural monopolies they are, in my view, better in public ownership.

They also provide a social good, but the US seems to have lost any desire to provide social goods. There is also a rising Gini co-efficient (on par with Mexico and China) and far less social mobility.

The time to build these is when labour is cheap, capacity is underutilised, interest rates are low and the private sector is repairing its balance sheet. I read an article from about 2003 about the age of bridges in the US. The last 10 years of consumerism have been to some extent at the expense of renewal of basic infrastructure like bridges, roads, public transport.

You also seem to reject modern monetary theory, that a sovereign issuer of its own currency that predominantly trades and borrows in that currency can spend without taxing or borrowing without inflation during times of what would otherwise be deflation such as extreme high unemployment and falling asset values for a large part of the private sector balance sheet.

I also think that you have causation of investment about face. Savings don’t automatically lead to positive investment in real risk assets or activities (other than that they have to go somewhere, but can go to government bonds as they are doing now because demand has fallen and lending against assets or to business is risky because of the lack of demand caused by households (50 to 60% of the economy) de-leveraging).

The greatest economic social and political problem is that 16 to 20% (don’t forget the non-counting of discouraged workers) of your working age civilian population can’t get enough or even any work.

As households de-lever and business don’t invest because of lack of demand and overcapacity, government expenditure on real infrastructure is the solution, particularly as the greatest unemployment is in construction and related fields.

Good luck with your own search for new and additional ventures!

For example, there are many who posit that there is no limit to government debt (Krugman comes to mind but I cannot claim this for certain although he continues to presss for more and more stimulus and deficit spending). Others have suggested that the government simply issue currency in lieu of debt (which immediately leads to your strategy #4) claiming that printing money is no less inflationary than deficit borrowing. At a minimum it avoids interest payments which will be no small matter to our children/grandchildren.

The great difficulty in achieving any of your strategies (save #4) is that the political class does not benefit from them (at least they haven’t yet). When politicians are voted out of office because they follow egregious economic policies then there may be an opportunity to reverse these fallacious policies.