The main problem with anonymous political donations is that it is easy enough to create linkage if the recipient and the donor conspire together. There are many other things that campaign laws are intended to achieve beyond avoiding bribery. For example foreign nationals cannot make donations to US parties. It would be a good thing if there were similar laws in the UK since at the last election a foreign national with links to organised crime alledghedly made a multi million donation to the Conservative party. Of course in the absence of full disclosure of details of party records nobody can be sure. We are as voters entitled to consider the worst however. Similarly it would be bad if a politician could obtain huge sums of money simply by espousing causes backed by lartge sums of cash. A candidate that proposed making large federal donnations to the arms industry (codeword "Strong defence") might expect substantially more donations than one who proposed a reversal of this policy. Similarly candidates supporting private prisons might expect funds from the likely beneficiaries and so on. The starting point for campaign reform has to be to cap the amount that can be spent on a campaign. Most countries have such laws to prevent the political process from being owned by the rich. Unfortunately this has happened in the US with the effect that both parties are much further to the right than in any other Western democracy. Phill