Progressives must surface the obstruction posed by the Democratic Party establishment. Primaries are prime time to do that, which means there is good reason for Sanders’ campaign to continue.
The proposal for a graduated capital gains tax may lead investors to hold stock for somewhat longer periods of time, but it is difficult to envision major changes in corporate behavior as a result.
Despite the growing revolt against the ruling class, it seems likely that the nominees in 2016 will be Jeb Bush and Hillary Clinton. After all, the ruling class still controls America.