Since liberals want to help the poor, why don't they overpay their taxes?

Let me just say thank you for pointing out the obvious here. The goverment isn't preventing all these liberal hacks from donating all their profits to the government. Turns out, they want others to do it but don't want to do it themselves. This is the walking contradiction of the Democrats, among many others.

And since Republicans want to support corporations and have it in their psyche that a corporation is a "person", why don't Republicans give their money directly to corporations and nominate a corporation as their presidential candidate...

Some do. I haven't accepted a refund for 20 years.

It's only the liberals who make little or no money that want the "rich" to pay more. Most rich liberals don't want to pay more and have their lawyers and accountants just like cons do to make sure they pay as little in taxes as possible.

I think we should. But perhaps we also should not bailout banks and auto companies. They're filthy rich, so why should we care?

Because one person paying extra isn't going to help much - but if everyone pays more, then the deficit could be lowered. They are using an ancient art called "math".

Because they don't want to pay more taxes. They want everyone else to pay more taxes.