Earlier quoted context omitted.
" why so much QE has resulted in so little inflation" The most common theory is that this loose equity sloshing around has gone into stocks and bonds. QE is keeping the stock market up.
This is also what I believe. If you look at the US QEs there is a tight correlation to the stock market. This most likely did not happen by chance. Inflation has simply been confined to some select assets. It's all going to come back into the mainstream economy unless the next recession/depression ends up being extremely deflationary before that happens.
Currently, we are hitting very low unemployment so wages have nowhere to go but up.
The weird one is housing: as rates stay low, people take on bigger and bigger mortgages leading to 'housing inflation' ... but it's generally not measured as inflation so it's kind another form of stealth inflation.