I think you need examine your premise, the only monopolies that have ever existed in history were all supported by the government. If you have some sort of example to prove me wrong feel free to post it.
By the way, the more heavily regulated an economy is, the more money businesses spend on government lobbying efforts. If you really want to get money out of politics you should be advocating for fewer regulations, not more.
Did you ever try the "everyone else is doing it" argument with your parents? Did it work?
Yes, there are examples of non-government supported monopolies.
Western Union grew throughout the 19th century and the 20th century, acquiring more than 500 smaller competitors. Its monopoly power was almost complete in 1943 when it bought Postal Telegraph, Inc., its chief rival.
Standard Oil was one the most famous of the US monopolies. By 1904, Standard controlled 91% of production and 85% of final sales of oil in the US. In 1911 the Supreme Court broke up Standard Oil for violations of the Sherman Antitrust Act.
US Steel at one time produced nearly ¾ all steel in the US.
De Beers for many years manipulated and control the diamond market.
AT&T Long Lines enjoyed a near-total monopoly on long distance telephone service in the United States for most of the 20th century.
Monopolies are still illegal but I think people will agree that when it comes to entry-level competition, the playing field is far from level. Even though the huge chain companies out there don't technically own the entire market, they dominate so much of it they pretty much eliminate any hope of ever successfully competing with them.
I don't advocate more regulations. I advocate smarter regulations. Most state, local, and federal regulation, serve the local communities and the nation well without creating undue hardships for businesses. However, there are some regulations that are just plain dumb and should be eliminated.