I've written that one thing we should copy is the Australian foreign influence measures that look at people who are acting on behalf of other states or state-controlled actors and make it an offence not to disclose who is paying you to say things, who is paying you to do things in this country. That would be a significant step, but that also involves giving the intelligence community investigative powers and adding criminal sanctions to punish those who are doing this.
On December 7th, 2020. See this statement in context.