Then why do they need to give the technical co-founder 20%, or even make him a co-founder at all? They either have enough privilege and connection that they can bring in serious funding from investors, future clients, or friends/family/fools, - or they don't and their privilege and connections aren't really worth that much. If they did, they'd much rather give them a few percentage points and pay them a salary, capturing all the upside.
It's a broad over-generalization but it's a good rule of thumb. They must have access to demonstrable money and/or power before they're worth an 80/20 split, well above what most random business guys can bring in from even elite universities.
Edit: A decent somewhat recent example is Theranos. No biotech VC would touch them because they do due diligence on the basic scientific viability of their investments, but Holmes and her cofounder were able to bring in huge tech investors from family connection and even get people like Henry Kissinger on their board, who also helped them get more investors. That's the kind of connections that might be worth an uneven split.
It's a broad over-generalization but it's a good rule of thumb. They must have access to demonstrable money and/or power before they're worth an 80/20 split, well above what most random business guys can bring in from even elite universities.
Edit: A decent somewhat recent example is Theranos. No biotech VC would touch them because they do due diligence on the basic scientific viability of their investments, but Holmes and her cofounder were able to bring in huge tech investors from family connection and even get people like Henry Kissinger on their board, who also helped them get more investors. That's the kind of connections that might be worth an uneven split.