General Discussion

Keep the Senate, but give them seats according to the number of citizens.

See that sales tax applies to financial products, too. Mitigate the impact by giving everyone a fixed discount on that. Make basic food, hygiene products, and books/newspapers exempt.

A bi-camera system makes sense in a federated state. But it makes sense to graduate the power of one chamber to ensure legislation can’t be blocked forever.

A Supreme Court is necessary if you have a constitution. But judges shouldn’t be political appointees only. Many other countries have a selection process whereby the nominees are appointed by the judges and the selection are done by an approval process in parliament (often not a majority vote, but an approval system that enables centrist candidates to emerge).

Here's my modified list:

• RCV, Approval Voting, or STAR voting
• Abolish electoral college, and abolish state legislative districts or at least implement a simple district-drawing algorithm
• Keep the senate and house I guess
• Give the supreme court term limits without reelection. You serve for like 10 years or whatever and then you go back to being a normal circuit judge or whatever else you want to do. Give them a bunch of bonus money at the end so they're less likely to take bribes. Institute strict ethics regulations. These can be arbitrated by a committee of circuit courts. Maybe expand SCOTUS to 13 seats (1 per circuit)
• idk anything about the house rep cap
• Universal healthcare
• UBI, universal unemployment, or shorten the workweek. As we increase automation, we require less labor for a decent standard of living
• Crank up income tax and close tax loopholes. Double IQS funding, they make more money by catching millionaires+ than they spend on doing so

The last two points reminds me of the Fair Tax proposal that was popular among Libertarian circles for a bit.

(I should note that the Fair Tax was the name and not necessarily an accurate description)

VAT is theft

For government overhaul would add abolishing the presidency and per district voting (just divide seats in the house based on percentage of the vote overall, I.e. one big district).

For the rest of society: abolish private ownership of companies, but award stocks to the employees instead. This will align incentives of the company with the people most impacted by its decisions.

Income tax can stay as long as its very progressive.

It would require a Constitutional Convention, large amendment, or several amendments. So really hard. Furthermore getting rid of SCOTUS and the income tax aren't good ideas. We need a court of last resort and a VAT is incredibly regressive compared to an income tax.