Either get scabbers, or take advantage of increased automation, or a combination of the two. The only way to prevent those scabbers is with outright illegal militant action focused on targeting them, which would earn you the ire of the state, and which most people also don't want to engage in due to moral qualms.
You can prevent a couple trucks from leaving an amazon warehouse for a couple days when you can organize a general strike where you're paying everyone a full stipend after saving maybe years of union dues, and that's the legal way to protest, which costs like, tens or maybe hundreds of thousands of dollars in expenditure every day, and is basically a war of wealth attrition with a huge megacorporation.
You could do that, or you could get like one or two guys to slash tires, and then set those trucks back for about the same amount of time. Or slash the tires of the individual scabber's home cars, which is maybe gonna be easier to pull off. How much of that militant action can you engage in, as an organization, though, before the feds just decide to completely crack down on you and deem you to be domestic terrorists, along the lines of what happened to the people engaged in the "stop cop city" movement? That's a good example of what's even a relatively low scale and low stakes operation, that's not very militant, and they're still getting slapped with rico charges and domestic terrorism.
People don't talk about it, but this is what jan 6th was. Not for a good cause, obviously, but basically everyone that was participating in that was either psychotic enough to willingly throw away their entire life based on a single ineffective and uncoordinated mass mob capital occupation on a single day, or they were small business owners who were able to afford to fly across the country first class and take several days off of work, and probably most of them were both of those things. A lot of these guys are getting arrested immediately after being pardoned because the prison system sucks and does not set you up for success, obviously, even for those wealthy people. There's not an escape from the state, even for them, their lives will be irrevocably altered and made worse by their participation in a single ineffective day of high profile movement.
Obviously you could action a good amount of political change onto people by simply making them think they have nothing left to lose, as we see with that, but again, mass, uncoordinated movements are broadly ineffective. More organized and militant action is what you really only get when people start to collectively understand that the people around them, the things they actually do have left, are under immediate threat, and they need to do something to stop that. Maybe even more than that, you probably need a funding apparatus which is either gonna be foreign, or probably based on illegal domestic activities. So probably foreign.
I dunno at what point some of those criteria start to be filled. It's not looking great.