The government's interest wouldn't be in the fashion choice. It would be in how the fashion choices are implemented. A generation or two of skinny people who a

The government's interest wouldn't be in the fashion choice. It would be in how the fashion choices are implemented. A generation or two of skinny people who are skinny because their parents used screening to only have children who have naturally thin body types should be fine from the government's point of view. A generation or two of skinny people who have naturally average or heavy body types but are skinny because they have eating disorders which result in them eating much less than they need to remain healthy should be of concern to the government. It could cause serious problems for the health care system.