Agreed. If I were king, I'd divide up the federal budget by the number of able-bodied adults under a given retirement age, and give every one of them the exact same tax bill.
But that won't happen. I'd settle for no deductions or exemptions of any kind. I don't care if you have kids, I don't care if you pay interest on your mortgage, I don't care if you took a bath in the stock market last year, I don't care if you make minimum wage. You are here, you enjoy the protection of the military, the protection of police and fire, access to the courts, the patent office, etc. You pay, he pays, she pays, everyone pays, no one gets subsidized at taxpayer expense.