The benefit cliff affects one demographic, and while affecting net revenues, isn't a tax issue. Software engineers fretting about moving into a higher tax bracket is another demographic, and is a tax issue.
These are different phenomena, generally affecting different people. While (a hypothetical I) could certainly lose out his social security medicaid by going from $0 income to non-0$ income, I'm not the person worried about going from the <80k$ bracket to the >80k$ bracket.
IME, the people who worry about making more money and moving into a new tax bracket are not people who are eligible for any meaningful subsidies to begin with.
These are different phenomena, generally affecting different people. While (a hypothetical I) could certainly lose out his social security medicaid by going from $0 income to non-0$ income, I'm not the person worried about going from the <80k$ bracket to the >80k$ bracket.
IME, the people who worry about making more money and moving into a new tax bracket are not people who are eligible for any meaningful subsidies to begin with.