Is Capitalism even any good when 65-75% Americans are living paycheck to paycheck?

No, it is inadequate. One way or another you have to reign capitalism in with some socialism. Whether it's Nordic style Social Democracy or American style New Deal/Keynesian "socialism" of the 40's-80's.

Asks the millions of illegals fleeing non capitalist countries to get to America.

Well you can always move to China or Venezuela.

Everyone lives paycheck to paycheck in the world. Everyone wants to be rich but its impossible.

History showed how communist and socialist counties fail.

In Capitalism you CAN become rich or live better if you want to. You study, get better job, work and you have it. In Socialism everyone are equally poor and can't work harder to get better life. They will always be poor.

In Communism you will be poor and silenced. When you will complain and demand better life - they will throw you in prison for 20 years. That's how it was in USSR. You keep your mouth shut. There was censorship. So people lived poor and did not know that other countries live better. Like poor folks on North Korea do now.

People were somehow happy in their prison country. It's when USSR broke down they saw how really poor they were compared to others. They had money but there was nothing to spend them on. So they just collected them. You had to wait for 5-10 years to be allowed to buy a car. You could not buy a house even if you had money. There were no microwawes, VHR, jeans, etc. Those who were allowed out of USSR like sports athletes - would bring snacks, jeans, sneakers, dresses from Europe and USA. Because food and cloth were very bad quality in USSR.

Food was limited. People who did not live in moscow - could live their whole life and never see a real banana, a pineapple etc. They were never sold anywhere.