Capitalism is owned and operated by capitalists, i.e. the owners and operators. Executives, upper management, shareholders.
Laborers had unions, which have been losing their ability to unite workers, since the late 1940s. Taft-Hartley being one of the first real damaging laws made to limit the power of labor. The unions have been losing more and more power since then. One reason why manufacturing/laborers have shifted from Democrat to Republican. Without someone vociferously backing you, its much easier to settle for crumbs. Or trickle-down. Same concept.
Capitalists, who are even remotely capable, are of course going to soak up almost all of the profits, while paying labor the least amount possible under the law.
The cost of labor is something that will always be targeted. The US was essentially built by slaves, and even free, paid workers have been called "wage slaves" by people who didn't need to work for someone else. Because that is essentially what they are.
Laborers will continue to be cut out as they are no longer needed. Capitalists in the 1940s and 1950s would brag about how in the future, robots would be doing the work, and man oh man, would labor love their shorter work weeks. Well, the robots part is coming true, and their abilities will only increase. The work week, though. Still essentially where it was. With wage stagflation needing boosts of credit just to keep up.
There are plenty of reasonable solutions to this upcoming glut of labor, but we can only get there if we're able to talk about it like reasonable adults.
Unfortunately, anything remotely close to not requiring every 18+ adult to dig ditches gets lobbed into communism and FreeShit™ by people with no understanding of how economics can't just stay the way it was 40 years ago, forever.
There are ways to prevent an economic collapse if/when robots and technology essentially replace another 10% of the labor force. But try having a conversation with someone who believes we all have to dig coal or put together widgets or its communism and FreeShit™. Those people just aren't capable of the reasonable, rational conversation required.