I agree, we're screwed. Within the next 12 years (probably much less) the system will break down under it's own weight. The life style that Americans are used to will be reduced first to total anarchy in the more urban areas, but will level off at about where we were in the late 1800's.
I have hope the system will be able to survive, but I don't think we will be where we were in the late 1800s. I can't think of a instance where technological innovation was lost totally from the stone age till now. (of course I could be wrong) also, those who are in the urban areas will fight it out, kill each other, starve and then head out to the rural areas...that will finish them off.

Then the Republic can be restarted on the same premise...only this time we are making a few clairifications to the Constitution.
I would add these to the Constitution as one amendment:
1. There shall be a separation of Church and State to the effect the state may not stop any religious speech. The State many not promote any church, but a simple disclaimer printed near or on any display or on record as not being promoted by the state will suffice if religious symbols, words or ideals are presented anywhere where it may be confused with as State sponsored.
2. Anyone elected official in government gets audited every year by both state and federal tax bodies. Any irregularities will be turned over to another state chosen at random for audit, federal would be turned over to a state that is currently controlled by a member of an opposite political party. All their spending and finances are public record and their bank statements are posted online for everyone to see in a financial recording similar to what is required of publicly traded companies.
3. Any bill that has any spending in it must have the names of who proposed it and no reworking after a vote. Any new part must go through the entire process from the start.
4. The entire US budget is graphed in an online pie chart that can be selected to view ALL aggregate data. All classified programs have to show all Congressional votes but need not be identified as what it entails.
5. Presidents after their presidency are wards of the state and will be given a stipend equal to 75% of their pay as a president. They are not permitted to make or spend any money after office that is not given to them as a stipend. The same goes for Congress.
6. Anyone found to influence lawmakers or elected officials decisions through bribery, extortion or collusion will be tried with a maximum of two appeals. If found guilty two out of three times, life imprisonment.
7. Murder carries the death penalty; they will be tried with a maximum of two appeals. If found guilty two out of three times, executed in no more than 90 days. All crimes are treated as they were committed that morning, 50 year old cases are punished the same.
8. Guns; everyone can own one except those who have been found guilty of a felony, violent crime, had the right legally removed or deemed mentally unfit. A panel of 9 nominated judges in each county will review every legal or medical recommendation for the removal of gun rights.
9. Anyone committing any act against the United States while outside the territorial boarders of the United States will have the same rights and privileges of those in the country that the crime or planning of crime happened. (Example: If they commit an act of terror in Syria, they get Syrian rights.) The trials can take place anywhere.
10. All Japanese prosecuted by the United States after WWII for water boarding are pardoned and reparations paid.
11. Water boarding is a legal for of interrogation.
12. It is not Cruel or Unusual if we think it is the right thing to do as punishment and use it on a regular basis.
13. Concealed weapons can be carried by any adult who passes the current Utah requirements for a concealed weapon and the weapon can be carried anywhere.
14. Fully automatic weapons can be regulated by a permit that cannot exceed ten percent of the first automatic gun cost. One permit is good for multiple guns. Permits must be obtained by Federal Agency similar to the BATF. The permit conditions are the same as those in 12. Silencers will have the same restrictions as they do now.
15. No other regulation or tax can be placed on firearms above normal item sales tax without an Amendment to the Constitution with each citizen of the United States voting on it. All non voters will be considered opposed to any change.
16. Rape is a punishable by the death penalty.
17. Insanity or personal hardship is not an excuse and cannot be considered in a court of law. Exceptions can be made when safety or health or others was at risk. Insane people can be punished the same as all others. Mentally disabled requires a jury of 100 people to vote unanimously that the person fits the definition of mentally disabled by a medical board of three doctors and would not understand the concept of right and wrong at a level greater than a three year old.
18. When minors turn 18 in jail, they will serve the rest of their sentence, required to finish High School and join the military or stay in prison for an additional ten years.
19. Hard labor, never killed anyone and will be used by all prisons for all non-violent inmates. Escaping from a labor program will get a minimum of 3 years solitary confinement.
20. If 30,000,000 people think that you are a jerk, they can petition to have your citizenship revoked and you deported to the country of your choice, which is not required to accept you. All petitions will require 30 million votes of living persons over the age or 18. A finger print must be provided and voting is anonymous.
21. You can opt out of a Union and keep your money.