> I assume that in a voucher-funded campaign system, if you don't give your voucher to any particular campaign, it would expire and go back into the general fund.

One would hope, though that's still wasteful. And without seeing a particular proposal, I don't know whether it would think to include such a provision or whether it would simply decide it knows better how to allocate those funds towards election campaigns based on the people who do use their "vouchers".

> I really like the voucher idea because it solves the issue of "I don't want my tax money being spent on candidates I don't agree with".

There's a much easier way to solve that issue: don't give tax money to candidates.