I'm not sure about voting directly on every issue, but we could certainly do with a lot more direct democracy - in particular, something like California and Switzerland's initiative process: get enough voters to endorse a question, it gets put directly to the electorate in a referendum, the results of which will be binding on the government. In the same way the threat of a Presidential veto can be enough to influence legislative actions, just having the option of overruling the legislature if it gets out of line would be a positive influence.