A tsunami of corporate money in politics is rapidly approaching. There may be effective long term strategies to contain or reverse it, but that wave of cold corporate political cash will arrive on our literal and virtual doorsteps by this summer at the latest. There is no way liberal activists, or even progressive PACs and Unions, can match it dollar for dollar, so I propose that we make a preemptive strike against it, and call it out wholesale in advance. The way I think we can most easily do that is to tap directly into populist distrust of "big money interests".
Slogans like I used in this OP title, and stuff like "If it really made sense why do they have to spend that many dollars trying to convince us?" can be used to make people naturally suspicious of all super funded political propaganda while simultaneously highlighting the adverse effects of the Supreme Court ruling, and stoking public opposition to it.
I remember when I lived in California, where there are always a dozen or more public referendums on the ballot, leaning a simple rule of thumb for deciding how to vote on all of them: Vote against the money. Most of the propositions were worded with 1984 "War is Peace" double talk, but the clear give away was always who had enough money to plaster the entire state with billboards? Whoever it was, vote opposite became my almost automatic mantra.
We need to start teaching the public that trick by making them suspicious any time massive amounts of media time get bought by corporations to promote a candidate. Tap into anti Wall Street fury and broaden it. Foster "who do they think I am to think they can buy my vote that way?" thinking. Condition knee jerk rejection of corporate funded candidates BECAUSE they are corporate funded candidates, and in that way start to turn their money advantage around against them.