That actually didn't happen with union organization before the government stepped in. You did get strikers who stayed on strike even when they lost their jobs or scabs were brought in.
And here I should also point out that there are enough well-off IT workers that a strike fund could fairly easily be raised. Certainly if miners are intelligent enough to figure out that they could force changes if they held out long enough, IT workers might as well.
What happened during union organization of mines and factories was that the government (or at least local government) sided with the mine owners. They then shot or dealt with organizers by throwing them in jail.
Certainly, that sort of thing would not be permissible even under a more libertarian view of unionization. The government would not be allowed to intervene on either side. They would be there to keep the peace and enforce legal contracts, freely entered into.
What the real problem is, from this perspective, is that most IT workers do not feel like they *need* to organize. For the most part, we're well paid, our job is not particularly dangerous, and even laid off workers find other jobs relatively readily.
So that does bring us to the question: Are we really as bad off as we think we are?