Since media is not a sector that has high margins, when a company gets under pressure to have to increase the salaries (e.g. by strikes), the management better starts to analyze how you can reduce the number of, in this case, tech workers because with thin margins, budging in these negotiations is much more dangerous for the mere existence of the business than if the margins are high.
Instead of going on strike, it would in my opinion be a better idea for the tech workers to look for a better paid job in an industry with higher margins.