Medicare for All aims to provide universal healthcare coverage, reducing the number of uninsured individuals who might otherwise forgo necessary treatments due to cost. This can lead to earlier diagnosis and treatment, potentially saving lives that might be lost under a system where access is dependent on insurance coverage.

A 2009 study estimated that lack of health insurance was associated with 45,000 deaths annually in the U.S. A newer study published in the medical journal The Lancet in 2020 found that Medicare for all would prevent about 68,000 unnecessary deaths per year.

Opponents of M4A argue that a government-run healthcare system could lead to inefficiencies, mismanagement, and lower quality of care, ultimately resulting in higher mortality rates. However, evidence from other countries with universal healthcare systems doesn't support this claim. Notably, these countries spend about half as much per capita on healthcare as the U.S.

M4A would eliminate the phenomenon of "job lock," where people stay in jobs they dislike solely for health benefits. By decoupling health insurance from employment, M4A would allow individuals the freedom to change jobs, start businesses, or pursue nontraditional career paths without worrying about losing healthcare coverage. This could foster innovation and entrepreneurship.

Opponents argue that employer-provided health insurance incentivizes productivity. However, research suggests that job satisfaction and intrinsic motivation are stronger drivers of productivity than benefits.

With M4A, there would be fewer insurance companies and administrative complexities, leading to significant cost savings. Streamlining the system could eliminate redundancy, simplify billing, and reduce waste, lowering the overall cost of healthcare. A 2020 study in The Lancet estimated that M4A could save over $450 billion annually in healthcare costs. Additionally, preventive care could reduce long-term costs associated with untreated conditions.

While Medicare for All (M4A) may result in increased use of healthcare services, particularly by those who were previously uninsured, the cost savings it provides are more than sufficient to cover this demand. It's important to note that individuals who were already insured through their employers do not absorb these savings. Previously, their employers covered the cost of health insurance, and now they pay a similar amount as healthcare taxes.

Universal healthcare can lead to a healthier population overall, which can improve productivity, reduce absenteeism, and increase overall well-being, benefiting society as a whole.

Implementing a universal healthcare system would require massive government spending, increasing the national debt and potentially leading to higher taxes. The U.S. cannot afford such a costly program. A 2022 study by the Mercatus Center estimated the cost at $32.6 trillion over 10 years.

Under M4A, the influx of new patients into the healthcare system could overwhelm providers, resulting in longer wait times for appointments, surgeries, and procedures. Countries with universal healthcare, like Canada, have experienced issues with wait times for some procedures.

Doctors and specialists might lose the financial incentive to provide high-quality care if their earnings are capped under a government-run system. This could result in lower motivation, decreased innovation, and a drop in the quality of care and innovation in the healthcare sector.

M4A would give the government significant power to negotiate healthcare prices, which could lead to price controls that hurt healthcare providers and drug manufacturers.

When healthcare is guaranteed, people may become less responsible for their own health, adopting unhealthy lifestyles or neglecting preventive measures, knowing that treatment will always be available.