172 Driver:
Just a little note, in US (probably same in Europe) the MSA is based on 25 nm from a NAVAID for reference. This navaid is not always located on the aerodrome, sometimes 15-20 nm away which makes the MSA less than helpful in some cases.
Do you have an example of a U.S. MSA that is that far from the airport? In any case, in the U.S. MSAs are not operational altitudes and don't provide required obstacle clearance in designated mountainous areas. Further, on RNAV IAPs MSAs are not sectorized so they often have no usefulness in mountainous areas whatsoever. But, you probably knew all this.