As a former union member I say a good place to start is by forcing the union to collect their own dues. No more paycheck deductions.
I what percentage of union workers really believe the union is good for the economy of out nation.
so the union thugs will be by the first of every month to “collect”.
Not exactly on point, but this reminds me of payroll deductions in general. If income taxes weren't deducted, but instead you had to send in a check every quarter (like I do on estimated taxes) people would think of it more as "their" money and would be much more attentive when taxes are raised.
Oddly, it was Milton Friedman who came up with the idea of payroll deductions during WW II. He was a young economist working for the NBER, and the government was desperate to raise funds for the war. He said later that he'd repeal it if he could, but thought it necessary at the time.