Have read many say the theocracy-favoring, anti-democracy Christian-fascist is a nice guy. That says a lot about them. And like you the feeling is there. It seems inevitable that someone will get further into Johnson and his wife's secrets. And so much secrecy has to suggest there is something damaging to hide.
Not gonna give Trump any credit though likely he deserves much for getting Johnson into the speaker's chair.
Also, as a congressman, he is automatically enrolled in FERS, so has an account that is over $5k in that system. In addition, OPM requires federal employee pay be dispersed via direct deposit. So clearly his nondisclosure is fraudulent.
And that is not even speculating on how he handles the Citizens United bribes related money.