"We can not continue to allow this over reliance on government to replace the cornerstone institution that has made the American experience possible"

This quote by Marco Rubio is describing the value of the family unit in the American experience. He is suggesting that the federal government needs to not be relied upon to replace the family, which has actually been the foundation of the American experience. He is emphasizing the importance of the family unit in offering stability, security, and a sense of belonging for people. He is likewise suggesting that the federal government ought to not be trusted to provide these things, as it is not as efficient as the family unit in doing so. He is stressing the significance of the family in supplying a sense of identity and function for individuals, and in helping them to turn into productive members of society. He is recommending that the government must not be relied upon to change the family unit, as it is not as effective in offering these things.