I’m sorry, but I saw this post and the responses and just had to register to comment because I am in such disbelief. Not at the OP, but the advice he is getting.
To the OP - the advice you are getting from these guys is the same advice I have heard given to students who are about graduate summa cum laude. Disparaging remarks like “You shouldn’t graduate summa! Employers will think you are “too academic” and don’t have real world smarts!” In other words, lame (near “I’m jealous and trying to destroy you”) comments intended to promote mediocrity by mediocre people.
Furthermore, I know you state this is just hypothetical, but I have a feeling it’s more than that… and that you have (or are) going to pull this off, and are worried because mediocre people have given you disparaging comments. Regardless, someone who majors in three distinct fields of study - business, social science, and a STEM field - with honors is, IMO, near savant level. You basically nailed the “big 3”. The fact is, mastering highly diverse fields is HARD. A lot of people can’t do it. That makes them negative towards anyone who does.
Some of the best and brightest thinkers and inventors in our history have had highly diverse academic and career interests. It goes beyond the scope of this post to go into those details, but look up some of the “big names” and their backgrounds. You would be surprised how many were concurrently social scientists/artists/major STEM contributors. People who can master social science, business, and STEM usually decimate most others in the job market.
To the people who have responded to the OP - I think you need to get out of academia and spend some time in the real world. I’m a grad student, but I spent 10 years in professional careers after undergrad before going to grad school.
I can tell you this - the workplace is absolutely dominated by people I would classify as pretenders and imposters. Employers know this. These people bring a huge amount of mediocrity and (sometimes) disaster to organizations. They have a narrow view, and can do ONE THING really well, but they lack the ability to see the big picture, lack the ability to understand anything outside of their narrow expertise. This is seriously limiting.
Sometimes it is just mundane. For example, I have worked with college grads who majored in the social sciences in a government agency. These people were expected to employ simple technology in the course of their work. They regularly failed to do so proficiently. Sometimes, they risked operational security due to incompetence when it came to following (and understanding) IT security practices. Occasionally, we would get a double major who had both a STEM and social science background. They absolutely dominated the social science employees in our workplace. All of the ones that I had the privilege of working with were fast tracked to positions of substantially greater responsibility within 1 to 2 years, while the raw social science majors hated their lives and were absolutely making no progress in their careers.
Organizations WANT people who have a multidisciplinary knowledgebase. To the OP again - you need to look at the CIA, FBI, and NSA. Seriously, look at the intelligence community job postings and what they actually say they want. You will find that they ALL want people with diverse knowledge backgrounds. It is not uncommon to find postings that will say “political science major WITH additional computer science degree”. Most people have no clue about these opportunities because only a small elite group of people have this kind of background… but trust me, these opportunities are out there. Might having 3 majors hurt you in say, applying to be a jailer? Yes, because you would be vastly overqualified and your peers and supervisors (typically of low education) will wonder WTF you are doing there. However, do you have a substantially better shot at being a CIA intel analyst than someone with just one major? Yes, you do, a huge shot, and I’m not even exaggerating…
Also, major matters in the working world. It matters a lot. Diverse majors give you options in the working world. A ton of people in the career world are trapped in jobs they hate because they do not have this diversity. A raw political science major is NOT going to be given a shot at a job that someone with a computer science major has for a computer scientist job. Period. It doesn’t matter how many years they have in the working world. As a major in business, STEM, and social science, you will be able to traverse into a wide variety of careers to an extent most people can only dream of.
Don’t worry about what the people here say… Diversity of education is far more important than “levels” of education. For example, someone with a B.S. degree with majors in business, social science, and STEM will absolutely rip apart and destroy someone with a B.S. in criminal justice, masters in criminal justice, and PhD in criminal justice.