Comment by NohatCoder

The main problem is overwhelming voters, for a vote to be meaningful the voter has to understand the propositions that they vote for. Given the amount of legislation passed it is quite unreasonable to expect everyone to do the due diligence for every vote.

What might make such a system work in practice is to only let a small randomly selected group of people vote for each issue. You still get a similar representation as a full vote, but with each person having much fewer votes to attend to it isn't overwhelming.