Other countries have faced inadequate infrastructure and untaught citizens about the market economy. Some countries also didn’t have laws in place to help support a market economy.
The Senate has the sole power to conduct impeachment trials, essentially serving as jury and judge.
If Congress stretched their powers too far, it is likely that the Supreme Court would step in after a lawsuit and rule that Congress was acting outside the scope provided for it in the Constitution.
Amendments and they were called the first Amendments.