yes, inflation is a form of theft - especially when it is sought purposefully.
The banker types have a point about inflation is being 'good' from a certain perspective. I have written about this on the forum before. The benefit of inflation is that it enables debt to be inflated away. For example, if one owes £1000 and there is no inflation the real value of the repayments remains constant and constantly as painful.
If inflation devalues the money by 50% then the money being used to repay the debt remains whatever it was before in nominal terms. In real terms the repayments now cost half as much, making repayments much less painful. So, from the perspective of the national debt, this may be the only way in which debt in the US and some other countries can be paid down.
Rich people tend to benefit from inflation because they tend to be closest to the point of issue of the new money that is feeding inflation. So, they get to spend it before it has become fully devalued. The poor tend to only ever spend devalued money because of the time it takes for that newly printed money to reach their hands. That enables rich people to buy up the assets of poorer people at a relatively lower cost.
When I last posted about this a week or two ago, I noted that this was an alternative to default on debt and also that default often follows hyperinflation anyway, making default a 'better' choice for many parts of the economy - but not the very wealthy.