No disagreement there. As the history indicated, the idea was always there since Roosevelt, but there was always an enemy of progress.

• disinterest limiting scope of Social Security
• convergence by Socialist and Progressive parties, labor unions, & regulatory pressure toward the rise & political dominance of employer-sponsored coverage
• the Chamber of Commerce, the American Hospital Association, & the AMA
• Nixon
• the Republican party
• moderates

This might be a case where the imperfect has been the enemy of good.