We have had representatives of three major departments associated with the Executive wing either outright lie or purposefully mislead by omission or redirection in the last year.

Government officials "taking the fifth" before Congress should be illegal. When one branch can stymie another the checks and balances fail.

Yup. If I'm paying you as an employee of my government then you can either choose to answer questions on your work so that I can evaluate it or you can find a job elsewhere. Want to take the fifth when testifying before Congress. Fine. But you can't work for the government any more.