Unfortunately, it was the hard work of the last 10 years by mitch and his henchmen to finally make it legal for pac sponsors to give unlimited amounts of donor cash.
So it's much easier for republiqans and many dems to acquire 10's of millions from a few billionaires and corps instead of looking for and collecting 2 or 3 grand from a 100 sources. It was quite tougher to amass millions when the donations were limited per donor.
Biden needs to totally rescind the mitch bills AND not allow an elected official to gain a lobbyist job for at least 5 years or more. Part of a corp owning a senator is also promising him/her a high paying job as a consultant or lobbyist. That needs to stop.