https://simpletax.ca/calculator
At $150k/yr, your marginal tax rate is close to 40%, but your overall tax rate is more like 31%. I'm in Saskatchewan, and every time I've played with different income levels, taking into account the exchange rate, we end up paying very similar amounts of all-in income tax, with ours including (most) health care. (Comparing with California)
There's still a benefit to having health insurance for covering stuff not covered by the gov't plan: vision, dental, some fraction of prescription drugs, etc. I do have a health plan through work, but I think it costs somewhere around $50-75/month to cover all of that stuff for my family.
Doc felt my wrist, asked me to go to the radiology clinic next door for a digital X-Ray, and to come back to discuss what he saw on it. Doctor visit: $30, X-Ray: $30.
When the two options are: use your provincial health card or pay cash, costs can stay relatively low.
2. Agreed-ish. Assuming 40% tax, which seems high (unless you live in a country that has nationalised health care)
3. Neither of these things relate to being paid to create jobs. You're not wrong, you're just not on thread.