From Physicians for a National Health Program - California Chapter (Aug 28, 2017):
Single payer's opponents, both in and outside the legislature, are playing politics. The reality is that, at the time SB 562's progress was obstructed, amendments were already waiting for consideration, including financing provisions based on a landmark economic analysis released at the end of May (see https://theintercept.com/?/pollin-why-single-payer-now-is-?/).
The legislative leaders understood this when they blocked SB 562, and the information was available to anyone else who had a genuine interest. Frankly, anything less than wholehearted involvement in developing and enacting a single-payer program without further delay is simply an accommodation of the insurance industry. The main barriers to single payer are entirely political, while unresolved policy and economic issues are far from insurmountable.
This is truly an unprecedented moment when support among physicians has climbed to 56% (Kaiser Health News http://org.salsalabs.com/dia/track.jsp?) and grassroots support for single payer has never been greater.