Is the lack of attention because unions have become so unpopular that it's not worth raising the issue? In 1952, the Gallup poll asked " In the labor disputes of the last two or three years, have your sympathies--in general--been on the side of the unions or on the side of the companies?" a number of times. After a long gap, the question was revived in 1999, and was also asked in 2002, 2005, and 2011. Each time, a plurality said unions--the margin ranged from 3 (37% to 34%) to 18 (52%-34%) percentage points. The average margin was 9.7% in 1952 and 10.5% in 1999-2011--the difference is not close to being statistically significant. (There are some ups and downs, but they have no obvious pattern, so I don't show the graph). So it seems like a pro-union effort would have a reasonable prospect of being popular with the public.
[data from the Roper Center for Public Opinion Research]