Generally when I see people use this they're misreading it. For instance, they'll see donations from people working at Google to a campaign and think they're donations "by Google" to a campaign, but companies can't donate to campaigns. It's also unlikely politicians sincerely care that much about a campaign donation capped at $3000.
In general if you think things are about the money you should be happy with politics, because the highest-raising politicians are Bernie Sanders and crew with $25 Actblue donations. But what actually happens is that they raise more money than Republican politicians and then still lose elections in red states. Republican voters and politicians both actually believe what they're saying.