The change to the law on candidates' election spending, passed without parliamentary debate, was made despite a direct warning by the commission against such "excessive spending to prevent the perception of undue influence over the outcome of the election".
"The perception of undue influence can be as damaging to democracy as undue influence itself," he said in his Light on the Hill lecture in 2014.
"The more we eliminate the perception of undue influence, the more we encourage people to participate in the democratic process".
Mr Quick said that there could could be a perception of undue pressure if a senior officer left a force to bid for a project to supply it.
To reduce the perception of undue industry influence, the Pharmaceutical Research and Manufacturers of America or PhRMA, a trade association, instituted a voluntary code in January that prohibits noneducational gifts to doctors and restricts meals.
Clinton has denied that such foreign donations had any bearing on her work as secretary of state, but the foundation has been accused of violating an agreement with the Obama administration to stop taking overseas money while she was in office to avoid any perception of undue influence.
Sir Jeremy Heywood, the Cabinet Secretary, added: "We have clear procedures in place to protect [Mrs Clegg] and the DPM from any conflicts of interest on any perception of undue influence and I am fully satisfied that these are rigorously complied with".
Mexico, the one Latin American country which has bucked the trend, slipping into violence, political dissension and economic difficulty, seems to have an undue influence on Americans' perception of the Southern hemisphere countries.
The Fourth Estate needs to go back to work battling the undue secrecy and covert perception management which will ultimately be used against them all and the U.S. citizenry.
Agreeing systems for communicating information to stakeholders at the outset of the study may help to avoid perceptions of undue interference or that the evaluator withheld important information.
