It is difficult to give complex answers here >one book that looks at the practice of Keysnian economics is "The Political province Economic ideas , Keysianism across nations. "Keysnian economics has been used at various time among many nations. Even conservatives like Nixon used it.
The example I gave was Australia between 2007 and 2010.
Increasing Tax on the rich does not necessary lower the money available. The very rich tend to wast their money by saving without increasing production .Governments can use the money better by investing in productive enterprises.
Hmmm -- '... waste their money by saving..."
Gotta tell ya - saving money for my retirement never impressed me as 'wasting' it.
Frankly, you are operating on the same tired misconception that most liberals do ... that, somehow, rich people stick their money in a drawer and never use it ... in reality, they 'invest' it by putting it in a bank account, or treasury bonds, or stocks, or whatever. But, is that money 'wasted'?
No - it's what the less rich use to finance their new car or house or tv or whatever .... where do you think the money in the bank comes from?? So - the money is double invested ... I put it in the bank and get interest, and you borrow it to buy a new tv. That is hardly called a waste ...
But, let's suppose, that instead of putting the money in the bank, I buy stocks and bonds with it ... that money is, in turn reinvested in the company, to create new jobs or new products or whatever.
Since your big complaint is that the middle class doesn't have enough money, tell me where they get their money - they borrow it, they work for it, they earn it ... and guess who pays their wages, or makes money available for them to borrow.
You're only looking at one side of the cube - step out of the box and look at it realistically.
Now, as for Keynesian economics ... you need to look for FISCAL stimulus, not MONETARY stimulus. What you call the Keynesian approach is actually monetary stimulus - lower interest rates, etc. This works, short term, producing a minimal spike in the economy (as has been happening over the past 5 years). However, in the long term, the economy is wracked by unemployment, insufficient tax income, slow economic growth, and inflation (as has been happening over the past 18 months).
The concept that the government can borrow its way out of a recession is, simply, pure folly. Given the finite amount of money available, every dollar that the government borrows (or, takes out of the economic flow through taxes) is a dollar that can't be spent in the economy. But, some say - if the government borrows it and puts it back into the economic flow, that's the same thing. Oh, would it be that were true ... the cost of government (in the US) is $.38 of every dollar the touch. In other words, when I give them a dollar in taxes, only $.62 is placed back into the economic stream. THAT is the law of diminishing returns, my friend.
You have a simplistic misconception of macroeconomics. I can't un-teach you here; you need to study it without prejudice.