You ask the wrong question OP. Do not misunderstood me, it is not about offending you
First: Define "mild". As stated above, a "mild" 2% inflation destroys the purchasing power of your savings by 80% by the time you retire (given you save the same amount every year in your pillow in cash!)
Second: inflation also needs a definition. Speaking in general, people define it as the rising of prices of consumer goods compared in a given time/space period (example: price of 1 liter of milk in 1st of jan 2009, and 1st of jan. 2010). Also count in market changes, like: disease in cows, number of cows increased/decreased, producers of milk changed, demand for it has changed etc. etc. So, it might be that the value of 1 dollar has not have changed, but the market price of milk did. See
http://en.wikipedia.org/wiki/Market_basket for more info.
Eco 101:
Let say, the whole amount of currency (which plays the money function) is a 100, and the whole amount of goods/services which can be bought/sold by that currency is also 100.
If the government - issuer of the currency - prints (QE by FED), for example, another 10 units of currency that year, the amount of goods/services is still 100.
Now, we have 110 currency for 100 wares. This will generate an increase of prices equals to the increase of new currency in the rotation, ~ 10%.
So, no, inflationary policy will not make people to spend more and increase the consumption, create new jobs, since the resources/labor/capital in the REAL PHYSICAL world did not have changed, we only had more colorful paper. Yes, by numerical count, people spent more, because prices went up, but the sum of the goods did not rise.
Some may argue, that new "money" fuels new investment. There is a basic fallacy here. For any investment to be economical, you have to earn more than you spend. Means: you have to make profit. But, if the money inflates for example, 2%, your profit rate has to be
n+2% of the usual
n profit to reach just the same amount of return, given no inflation!
Also, if you can not find an investment, your money gets less and less, year by year. (hence the loss of purchase value).
Actually, that is why the stock exchange is pumping up, the newly created money tries to find a way to not lose value (compound interest).
Of course, the newly printed money first gets into government's pocket (infinite budget!), whom them sell it to the banking system for interest rates controlled by the same government(!), then the banks can lend it out to the real actors of economy for a significantly higher rate than the inflation rate, hence the only participants who win out with inflation are governments and "friendly" banks tied to them. That is why every single state in the world is in ever increasing debt year by year (the real economy can not produce that many goods/services as newly created money produced/year).
In this system, inflation makes money a "proof of debt".
That is why Keynesian policy is a nonsense...
Now, let us examine the definition of deflation in a free market economy setup (like Bitcoin).
It means, that the same laptop you would have bought in 2004 for 500$ now you can buy for 50$, or you can buy a 10 times faster laptop for the same 500$. The purchasing power of your dollar increased for the same technological level, or you can get a 10 times better technological product for the same price!
This does not mean you wont spend your money. It only means, that the wealth of the world (product/services) increases, and you either need less and less unit of money to get the same product, or the same amount to get a better product! Actually, this increases the incentive to invest and save, because, now you have a vested interest to create better products, which you will also be able to pay, since your money does not depreciate, so you do not "have to spend it" because the rate of inflation is faster than the rate of product improvement.
This makes the Bitcoin money system, a money where it is a "proof of value".