Apart from its redistributive effects, high and variable inflation also tends to undermine long-term investment, so it is important that inflation is kept under control, and monetary policy is best placed to do this. But in trying to stem high inflation, monetary policy may have negative short run effects on economic growth. Conversely, monetary stimulus will only impact on cyclical growth.
To cut a long story short, much of this is still outstanding to IBRC, and much of it is secured by the Promissory Notes. Funding such flows is not something that a central bank will normally do for any longer than is necessary.