Argument: Open primaries can be modified to limit costs
"Rage against the machine." Times Online. August 5th, 2009: "Open primaries are not a panacea for the disrepute into which politics has fallen. Nor are they without problems. They can be expensive and there is a case for the cost of the ballot to be met out of public funds. It might be necessary to limit by law the amount that can be spent on a primary campaign. Candidates might need party funds to conduct a viable campaign."