The government doesn’t calculate the cost-of-living adjustment for seniors properly to begin with.
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I’ve been on SS for 11 years and I think I’ve only seen ONE slight increase in my net pay, but the Medicare deduction from my check increased a couple of times to wipe that out.
I think it should have increased (very slightly) a few times in that time period. But the basic point is correct: this large group of people are treated unfairly because they are perceived as past their usefulness.