So for #3 your plan double taxes the small business. In order to protect themselves from lawsuits, small businesses often organize themselves as S corps or C corps.
If they company makes a profit, then pays taxes, then pays themelves a salary, then the person pays taxes on that salary, you have taxed the same income twice.
Some will then say - change the corp structure to sole proprietor but that then forces more risk onto the small business owner as their non-business assets such as their homes and cars become attackable via a lawsuit against the business.
Also, how would you address the business tax? Would you tax revenue or profit. If you tax profit, then you have to allow deductions for expenses to operate the business. If you tax revenue then you have created a national VAT that is inflationary as all the businesses will simply pass on the VAT to the price of their product.
Corporate income taxes should be abolished. Instead, require that earnings cannot be retained in the corporation for more than three years. This allows a reasonable rainy day, R&D, or M&A war chest, but ensures that profits are eventually distributed to shareholders or employees where they can be taxed as ordinary income.
When considering how to “save” the country, I don’t think you could do better than abolishing the corporate income tax and putting a flat income tax rate on individuals. Those two changes would make America the best place in the world to operate a business and employ people.