Like literally, the amount of instances where the government is weighing life/death is very small, even smaller at the federal level (most death penalty cases are against state laws). If you're meaning in the 'government programs can greatly affect my quality of life', then private companies can totally do that too - through targeted advertising.
That the government has power over you at all is what matters, not how often it exercises that power against you. Already parallel case construction is a troubling problem (given the warrantless domestic surveillance). Grant the government access to surveillance capitalism / ad tech, and now you've got another vector to launder evidence.
Like literally, that is the basis for state power - several iterations of "...or else" finally end with "we kill you". Private companies don't enjoy that privilege - because they don't have the power to distinguish murder from justifiable homicide.
