Is it really difficult to believe that a group of people in charge of something may be biased?
Calling it a "conspiracy" theory is just dismissive slander at this point. People have conspired successfully to achieve far greater and more malicious goals.
That would be an awful lot of work for such a tiny gain. And it doesn't scale. AT ALL. What moron would go to the trouble? Iowa picks corn, not presidents.
What hard work? How many devs do you have to pay off to write a handful of lines of code manipulating a secret ballot, especially when they may be willing because of personal bias? We know electronic voting in its current implementation is severely vulnerable to tampering, both external and internal.