The objective is not to increase tax revenue. The objective is to return as much income as possible to the rightful holders of said income (i.e., taxpayers) while still collecting enough tax revenue to maintain a government committed to national defense, law/order, basic infrastructure, and fulfilling promised obligations (e.g., Social Security/Medicare and long-term fiscal stability). The endgame is economic freedom, personal liberty, and a fiscally responsible, minimalist government.
There is a role for government, but that does not mean it is the be-all and end-all of our lives.
It all sounds nice, but it doesn't change the fact that the government is spending more than it is receiving taxes, and that Romney doesn't give any meaningful specifics on what spending he would cut. We can no longer afford to play the usual game of tax cuts today, spending cuts to pay for them tomorrow, because tomorrow never comes.