No, I've never had to blackmail my employer to secure better wages for myself.
Haha, this is surely bait ?
But heh, I'll bite !
If you're lucky enough to be doing a fairly specialised, or skilled job, then you're normally in the driving seat when it comes to pay negogiations. If you're not, then your employer will be looking to sweat their assets ( including their employees ) as much as they can, so they can maintain or increase their margins
Most collective bargaining has a bit of give and take on both sides and doesn't get to the point where strike action is threatened. When strike action does actually get threatened, that normally focuses management mind a bit, and they give a little more.
Very occassionally, strike action actually happens, and sometimes that's the fault of the managements intransigence, sometimes it's the unions, but often it's a bit of both. Plainly some unions overstep the mark on this sometimes, but so do management.
If you remove someone's right to strike, then that means the management is immediately at an advantage when it comes to negogiations. Without a clearly defined mechanism for an independent third party to make a judgement on a union's claim, whether it be pay or more general working conditions, then removing peoples right to withhold labour isn't far off withholding a basic human right.