I don't think they have 66% of both houses willing and able to vote for this, nor do I think the general populace would pay 2% on sales tax, no.
27 of 40 senate seats is 68%
55 of 80 assembly seats is 69%
I also think you're wrong about the sales tax. If you spent 3K on stuff each month that get his by sales tax you would pay roughly $60 more for free healthcare.