These are all good questions, and details would of course have to be worked out, but in Sweden where we do have a system of state funding for political campaign

These are all good questions, and details would of course have to be worked out, but in Sweden where we do have a system of state funding for political campaigns, I've never heard of these issues arising in practice. I'm not sure what the details of our rules actually are, except that your party gets funding if you got more than 4% (edit – correction: 2,5%) of the votes in the last election and that people are free to volunteer their time.