Preprint Political Parties Funding Recent History
Parties seek more money from the taxpayer but there will always be tight constraints on this source of funding. The obvious source of big money is rich donors and corporations. But such donors are not usually motivated by generosity. They want to see a return.
Political parties in a number of countries now accept large donations on the condition that the donor can be identified. Some have also banned donations from abroad. For officials who are tempted to evade rules on party funding the current punishments hardly act as disincentive.