Drunk driving was always a problem, but it became a national issue after policy entrepreneurs, such as Mothers Against Drunk Driving (MADD) emphasized it.
Explanation
A policy not demanded by the public can be addressed if someone in government is interested in it.
Most people pay for Social Security, and most people will receive its benefits. This is an example of majoritarian politics.
The Great Depression, civil rights movement, and environmental movement all increased the scope of the government policy-making. Wars have always been the subject of policy-making.
Policy entrepreneurs pursued legislation affecting automobile safety, the meatpacking industry, and highway safety.
Interest groups, institutions, and the media all impact the policy agenda. In addition, the agenda changes when there is a crisis.
Logrolling occurs when members of Congress agree to vote for one another's bills. These bills usually contain several projects to benefit specific distrits and are known as "pork-barrel" legislation.
Senators are more visible than representatives, and so more of them run for the presidency. They want to be policy innovators on attention-grabbing issues.
Under the cost-benefit analysis, every policy involves a group that will be helped and a group that will bear the expense. The interests of both groups are considered as part of the policy-making process.
Industries, like the airlines, resisted deregulation, because it led to more competition, lower prices, and fewer prices.