I don't think this is practical. So say your friendly neighborhood oil company sends a memo out to its employees saying "We need to drill in the [Insert National Park] to stay in business. So if you want to keep your job you need to send money to politicians that will allow us to drill in [Insert National Park]"

If that statement is true and the company would really go out of business than it isn't coercion. But the end result is the same as you have now.

The same is true for Unions just substitute "You have to elect this person or they'll gut your social security and take away your pension" in place of drilling.