It does say that. But the reverse is also true. The government is spending that money; someone is receiving the benefits of that spending. Since we’re talking about “medicaid for all”, the beneficiaries are “anyone who needs medical care”. Which means, we will receive, on average, $355000 worth of care, per household, over a 10-year period.
Of course, nothing of this analysis is in any way reliable. The per-household cost of health care with commercial insurance is far higher than the cost of health care with Medicare. Higher still is the cost of forgoing medical treatment due to financial concerns.