Over the last few decades, since the crash of 1989, Japan has injected billions into its banks and stock-market to help its economy but all of it has been a miserable failure. America has, via the Federal Reserve, increased its national debt to formerly unthinkable numbers with almost no effect on its ailing economy. Most of Europe has huge public debt as a result of bank bailouts, but still suffers from stagnating or shrinking economies.
In fact, any privately owned central bank that has undertaken monetization policies (creating more public debt) has failed to improve their nation's economy and merely created a transfer of wealth from the general public to corporate hands.
Of course, government owned banks such as in China and Russia are and do take somewhat different actions given that they are owned by the public (state owned) and not private individuals or corporate entities. Therein lies the crux of the matter – private ownership means private interests, therefore the needs of the country and the populace are of no concern at all.
All that the Fed, BoJ (Bank of Japan), the Bank of England etc. have been concerned with is the preservation of private banks and the continued propping up of stock markets. None of these institutions really care about the real-world economy, real-world inflation or the ability of individuals to maintain their lives in a prolonged period of economic contraction.
While monetizing is all great news for the banks and stock-markets it is terrible news for any people that do not receive well over average earnings – this is because monetizing debt (printing money) causes inflation. As with everything else connected with the economy, governments cook the books on inflation to the extent that the CPI is a total fantasy designed to give falsely low inflation rates.