Earlier quoted context omitted.
"common sense" is common sense because it is not "specialised sense" or "expert sense" So if politicians base their decisions on "common sense", they confess to not being able to use experts that refine their knowledge and position about a topic. A "common sense" strategy is therefore what is most popular and on the basis of the understanding of laymen without deeper understanding or knowledge.
"common sense" is common sense because it is the "sound and prudent judgment based on a simple perception of the situation or facts" (1). Maybe what you meant to say is that the position isn't, in fact, "common sense", that it is neither sound or prudent? (1) https://www.merriam-webster.com/dictionary/common%20sense
The dictionary definition is in spite of the fact that the phrase "common sense" is more often than ever being used to rebrand what was formerly known as "common lack of sense".
They wouldn't say it if it wasn't false :\