Obama signed a 2 million dollar book deal less than a month after entering the Senate. He average an income of less than $300,000 annually before entering the senate, after which he averaged well over $2mil annually while serving in the senate. Michelle began making over $300,000/yr serving on various boards when he entered the senate.
He reworked his book deal for MUCH more money two weeks before swearing in as president. He entered gov't as upper middle class and exited as an EXTREMELY wealthy man.