You shouldn't feel bullied into striking. We're in the same boat - 4 of us being supported on one teacher's wage. It's not a bad wage, but we can't afford to lose a days pay. None of my husbands collegues are striking (except the science dept) at his school, despite belonging to the unions taking action.
My husband voted NO by return of post he was so against the strike. He voted to work to rule instead. Only 40% of his union bothered to respond to the ballot and of those 80% voted to strike. Not great at maths but thats around the mid 30 odd percentile of NASWT that want the strike.
For years he's paid his union subs on the off chance he needs them to fight his corner in an individual dispute. He carried on paying despite the fact that early in his career, they washed their hands of him when his head refused to acknowledge his degree or his Masters, which was from a top US university. He kept his subs going because he thought it better to be on the safe side. Teachers don't usually strike, especially his union, so it's not unreasonable of him to have joined thinking this was unlikely to happen.
People should do what they feel is right for them, not be swayed by some rhetoric about causes and moral obligation. You pay your dues to the union - it serves you, you do not serve it, otherwise you're labouring under yet another type of tyranny. You can think for yourselves - you're not a collective. Noone should be pressurising you to relinquish pay you can ill afford. If you support the strike and can afford to lose pay, go for it. If you do but can't, then you should weigh up your priorities. If you don't support the strike but pay your dues for other union services, then hold your head high and go with the courage of your convictions.
We went into teaching (I'm a SAHM with small kids right now but have taught for 12 years until 3 years ago) because we loved our subjects and wanted to enthuse young people about them. We get a decent wage (not me, obviously, at the moment) and tremendous job satisfaction. Never for a minute did we ever think about what our pension was.