Where "oversight" is defined as "coming up with some shit on your political opponent that the previous witch-hunter was not able to produce."
The fact that Presidents, Congress, the Judiciary, the IRS, intel agencies, the FBI, the DOJ etc have rights that may be properly exercised as intended by the constitution and statutes does not mean that they always are, YA THINK? Sometimes they are exercised for raw political purposes. YA THINK, ON STEROIDS?
There are too many laws to cite as to why it is important the holder of the presidency needs to have their financial ties vetted by congress and this is normally done through the financial disclosure form when a person registers to run for President. Trump’s disclosure was a joke.
Candidates have released returns in the past and those get analyzed without much ado. Trump has not released his returns and associated filings AND there has been credible allegations made by his associates of wrongdoing with regard to his business practices and taxes. Also:
His foundation was shut down for impropriety and
Numerous publications by the press of financial misdoings.
That is enough for congress to pull those records and review and be in full spirit of oversight responsibilities.
Your argument is merely a complaint meant to mitigate and does not address the core issues. While there is some motivation politically, it is not the only motivation and if congress were shot down every time there could be any political motivation associated with oversight responsibility then it would bring the constitutional mandate of oversight to a screeching halt.
Ways and means should investigate for the purpose of crafting law as well. There is currently no law on the books requiring presidential candidates to release returns. Trump’s returns may be useful in crafting that law. That is all. End of story.