At least in the US we can easily find out this information and vote on it.
https://www.politico.com/magazine/story/2019/08/02/joe-biden...
Dig just a little bit, and you'll find examples on nearly everyone who has been in DC for a while except perhaps Bernie Sanders who's "only" worth $3.5M.
"You can't get rich in politics unless you're a crook" said Harry Truman. This holds to this day.
Obama, probably one of if not the most well-known person IN THE WORLD, wants to write a book. How could the deal not be worth a ton? Makes complete sense.
Also the book is just a book. If people buy it, then he should make money.
Best thing would be if the president's family already had successful businesses and did not expand them thanks to "the name", which is what we have now. Mike Pence's family also didn't suddenly become "very talented" either it looks like, or we'd know about it already.
At a minimum, I want the "free press" and the various oversight bodies to scrutinize this shit with a magnifying glass and drag it into the open _irrespective_ of the political affiliation of whoever is in the White House.
Do you remember all the freely available information that showed Banks, Oil companies and massive corporations all spent considerably more on Clinton's 2016 campaign, yet somehow the media tells us Trump is "Big businesses" guy those companies worked hard to get into office? Easily verifiable to you right now. Are you going to go check my work? Opensecrets.org
Cognitive dissonance is never so strong as when we are telling ourselves it's not cognitive dissonance.