Why don't control events fire on base interface?

Why don't control events fire on base interface?

References

Reference NO 1

http://stackoverflow.com/questions/15187229/why-dont-control-events-fire-on-base-interface

Reference NO 2

http://www.xtremevbtalk.com/archive/index.php/t-316517.html

Reference NO 3

http://msdn.microsoft.com/en-us/library/orm-9780596516109-03-09.aspx

Reference NO 4

http://www.bogotobogo.com/CSharp/csharp_events.html

Reference NO 5

http://www.ni.com/white-paper/2962/en/

Reference NO 6

http://369o.com/data/books/atl/0321159624/ch11lev1sec5.html

Reference NO 7

http://www.spyvee.com/SAPHTML5_DemoKit/docs/guide/ControlDev.html

Reference NO 8

https://sapui5.hana.ondemand.com/sdk/docs/guide/List.html