A lot of people don't realize that the monetary policy of any given economic system benefit some groups and it may have a negative effect on others. Ceteris paribus inflation benefits those on debt with a fixed interest rate but is bad for people that hord their money under the mattress or in a savings account that pays next to nothing...to name one example.

Also, it's not the same to print money for a world currency like the US dollar (where the extra supply tends to go to foreign markets or to the stock market) therefore not creating inflation in the domestic retail market.

In principle increasing the money supply is not a bad thing if it grows in tandem with economic activity. In that scenario the value of the currency remains constant. So it all depends...it's not a simple math problem.