The multitude of programs and technical detail complicate the direct comparison between central banks. In terms of their objectives, however, it appears that the Eurosystem and the Fed are very similar: stabilize the transmission channel from its starting point – interbank markets – to its end point – the effective flow of finance to the real economy.
https://www.centralbank.ie/news/article/speech-irelands-engagement-in-europe-1-oct-20  2/5  02/10/2020  Ireland’s Engagement in Europe and Deeper Integration of Europe - Deputy Governor Sharon Donnery  From these beginnings, later steps were taken to implement a banking union, which is particularly important in a monetary union as problems in other countries can quickly spill over borders.