I see this argument repeated over and over on HN, with 0 evidence for it. Any "evidence" people cite is usually of the "politicians are evil, so this should be obvious by definition" kind, sometimes of the "they tried x in the past, so surely some unrelated y they're trying to pass in the future is also about x" kind.
I haven't seen a single leak, a single admission from somebody trying to pass a law like this, that surveillance is actually the goal here. There are far too many politicians trying to pass laws like these, in very different countries across the world, for some kind of giant global conspiracy to stay undetected.
Plain ignorance seems far easier to believe.