According to the English Wikipedia page about the Galician Parliament https://en.wikipedia.org/wiki/Parliament_of_Galicia, the Parliament of Galicia has amongst its functions “to exercise legislative power,” and “to control the executive branch or Xunta de Galicia, https://en.wikipedia.org/wiki/Xunta_de_Galicia “. The problem is that the party (every party) that wins the, in this case,  Galician Regional Elections, held every four years, also holds, normally, the majority of the seats in the Parliament of Galicia and, in this way, the principle of “non-confusion between the figure of the controller and that of the one to be controlled” results systematically, one (autonomic or regional) election after another, violated, broken. Those who hold the power are, at the same time, those in charge of controlling  those who hold the power. A vicious circle, as in Lou Reed´s song, https://www.youtube.com/watch?v=Sy3dWmGhYco

I don’t find any substantial differences in US,  the United Kingdom, and other places:

https://en.wikipedia.org/wiki/Member_of_Congress

House of Commons of the United Kingdom – Wikipedia

Have a look, in particular, at this:

First-past-the-post voting – Wikipedia

The “Galician model” is the one applied  in Greece, too, for instance  (where the party that wins the elections gets a bonus of 50 additional seats in the Hellenic Parliament, for promoting “stability”): Elections in Greece – Wikipedia

 

 

 

 

 

 

 

 

 

---