One thing that I do not understand is the chart on your post that shows 11 different candidates (including Cruz) having received campaign donations from commercial and investment banks.
Are you now saying each of the 11 candidates received zero interest loans from the banks, or just Cruz?
And if it was just Cruz, what kind of campaign donations did the other ten receive?
“You can lead a horse to water but you cannot make him drink”.
This isn’t complex rocket science. Follow the money.