Ask (generically) to Spanish if they like paying taxes and see how 80% say no.

CEO, independence of Catalonia and the difference between a generic and a specific question.

But if the question (specific) is: Do you think taxes should be paid to cohere society, there is a bla public education, health and blah, blah "... 
The winning answer will be YES.

Forgive need to make comparisons almost "Sesame Street" but is the category of Spanish and Unionists ...

The survey has the weight you have, or none, because if so would not need to make choices and that the deputies were shared according to the latest survey of the Reason ... or half of all ...

Another example is that Rajoy sends thanks to a 39.14% support. There were 60% of those who voted who were not given and must swallow ...

Moreover, if, as intended from Madrid to the survey of CEO, we even those who do not vote (total census), is that 71% did not give him the confidence to Rajoy ... And if we add the entire population of Spain there is a 83% of the population did not support Rajoy ...

Yes, Rajoy obtained 7,941,236 votes: 
a stake of 24,279,259 (Congress) 
a census of 36,520,913 
a population of 46,624,382

Many people against Rajoy ... but he sends ...

And there is no point in a survey say they do not want to Rajoy and then vote as "less bad" or stay home. 
As always in democracy, only count those who make the effort to put an envelope in a ballot box. Everything else is musings ...

2.91 is the assessment of Rajoy, and there you have it , holding the reins of Spain ... 
People think that is an ominous political but not doing enough to throw.

So there , according to the CEO - 49.4% of opposites to independence it does not mean much because we do not know their motives. 
There are even some (because there are) who do not want independence because they believe that Catalonia would be a bourgeois state or remain in the EU. 
Instead, those same people say they want independence if linked to a revolution and outside the euro ... 
And it may happen that when voting the referendum finally opt for the YES as afirst step after getting a anticapitalist and asambleario state. 
Be careful, there are also people who do not want order independence because they are afraid to send the left (as so be it ).

Anyway, the only way to know is to the polls. And I advise supporters who will vote NO.