They might want to listen to Kristen Soltis. She looks at younger voters feelings about taxes and government:
There is a belief structure among young voters that is slightly in conflict with a core principle of the Republican Party – the belief that the free market trumps government. Young voters have a more positive view of government and are not as convinced that the free market provides better solutions than government.
Yet on the issue of taxes, young voters do believe tax cuts can improve the economy, despite their uncertainty about whether or not tax cuts are the best option.
If the Republican Party wants to win young voters in the future, an understanding of the ways that young voters view the economy is essential. Messaging that focuses on the need for less government and lower taxes is not likely to be as well received or convincing to this generation. This isn't to say these messages won't work, to be sure. But the spectre of Big Government is not as frightening to young voters, nor is the devotion to the free market so prevalent. In order for the Republican Party to grow long-term, they must work to impact these belief structures and spend the effort convincing a new generation of the sorts of beliefs that are taken for granted among older cohorts.