Step 1: Let the Bush budget cuts expire for everyone. Everyone must make some sacrifice to solving this problem.
Step 1a: Complete tax structure overhaul towards a flat tax type system (just a framework):
Personal: Deductions: Standard: $20K per independent worker, $7.5k per dependent (dependents who file can claim $12.5k) OR 10% of total income.
Charitable donations, up to 10% of total income (can carry over excess from one year to next)
Education: Up to $5k for tuition or student loan interest
Homestead: $10k per year initially, falling by $1k per year over 10 years for owning a home (regardless if you have a morgage or not)
IRA/401k/other tax deferred retirement accounts: Current limits
Capital gains are taxed as regular income.
Tax rate: 20% of all income above deductions (everyone), minimum tax of 2% of all income for all taxpayers above 18 (those under 18 can't vote and shouldn't be forced or required to pay a tax because they have no say in how it is used).
Estate Tax: Cash above $250k is taxed as regular income. Property (stocks, bonds, real estate, businesses, etc) is treated as having a basis value of 1/2 of current value and is only taxed as income when sold.
I recognize that something will need to be done for small business to account for the expenses and that small business profits are not equal to income for the owners.
Corporate Tax: 7.5% of reported profits.
Spending MUST come down and to do so entitlements MUST be reformed.
Medicare/Medicaid: I think that Ryan's plan has some merit. The system does need to change from a defined benefit plan to a defined contribution plan from the government. I think that providing a basic level of coverage and allowing people to purchase increased coverage and care is the way that it needs to be done. The problem is that we are trading the inefficiencies of a public sector program for the profits of a private sector program: compassionate is not a word that is often used to describe the insurance industry.
Social Security: Some form of means testing should be instituted, but it needs to be based on lifetime earnings and not on total saved at retirement. Basing it on retirement saving punishes those who saved diligently and were financially responsible while rewarding those who were not. Like medicare/medicaid the system does need to change from a defined benefit plan to a defined contribution plan from the government with the impending retirement of the baby-boomers. No one that I know wants the elderly to suffer unnecessary financial hardship, but their is only so much that can be done without putting to much of a financial hardship on the rest of society.
Defense spending: Sorry, this must come down. This might be the most tricky balancing act of all, we need a military capable of fighting a major traditional military campaign but with the flexibility and adaptability to respond to terrorism. This requires a long term strategic military planning that is coupled with foreign policy objectives. I think that we need to reassess our larger role in the world and decide if continuing the era of Pax Americana is something that we are willing to pay for through increased taxes.
"Discretionary" Spending: This isn't the problem, the other three areas are (plus interest on the debt) and getting rid of all of it isn't really going to solve the long term problem. Everyone has their pet projects that they love and think that other projects are a complete waste of money. The problem with so many of these projects is that they are open ended and require continuous funding.