This isn't a competition between 10% of the workers and 90% of the workers. There isn't a fixed amount of money allocated to 'labour'.
It's a competition between the capital/investment cycle of the economy and the labour/consumption cycle. In this case it boils down to leverage in employment negotiations. Those 10% crackerjack hyperworkers you're theorizing exist would be even BETTER off if they were recouping a larger amount of the margin they were producing.
I'm not sure I understand your point. My point is simply that those 10% are better able to capture the value they create, whereas the bottom 90% are not. I'm not making any assumptions about a fixed-size pie.
The point is, those 10% aren't better able to capture the value they create. They're just in a more favourable position from the perspective of the labour market. It doesn't mean that the fact that they are 'knowledge workers' is giving them magical new tools to outperform everyone else. It just means they're in demand because the market is vomiting money at tech companies, so tech companies are sucking up every developer resource they can find in their sprint for growth.
You can make developer bucks working as a blue collar worker on an oil rig, or as a normal dude on a fishing rig. These people aren't making cash because they're 'knowledge workers'. They're just supplying labour to a field with solid demand.
It's a competition between the capital/investment cycle of the economy and the labour/consumption cycle. In this case it boils down to leverage in employment negotiations. Those 10% crackerjack hyperworkers you're theorizing exist would be even BETTER off if they were recouping a larger amount of the margin they were producing.