If you think a person who wants to carry or transact a supposed worth of 10,000 EUR or 3,000 EUR or higher, without being tracked, is performing an action befitting of the word "criminal" (and often the harsh, cruel treatment that comes with this word) -- and if you think these actions warrant subjecting the entire society to search and seizure (and the dramatic consolidation of power that it grants) -- then, unfortunately, you don't see what the problem is.

You might not be bothered by it. But I implore you to look past your own comfort and respect that others are bothered -- to at least see the possible problems. I'll reduce the terms. Many people don't want their personal, consensual affairs tracked, limited, and dictated by a central authority. A central authority for sake of discussion is the entity that tends to strip people of their physical and psychological humanity by means of economic persecution, containing people in cages, subjecting people to various forms of isolation and torture, and killing people. Thus, in no uncertain terms, many people don't enjoy increasing the power (i.e. legal and otherwise) of that central authority. They especially don't like doing so, the more they see the system on which it operates as being oligarchical, abusive, and unethical.

How many times must it be repeated through history's political systems to understand that predicating laws upon [search and seizure] is a fast-track ticket to tyranny? The United States has been riding this road for a long time. See: Prohibition / Drug War. Do you see a problem with an economic incentive for subjecting people to searches? Do you see a problem with their labor/value stolen? Would you see a problem if it were a mafia setting terms (hell, they could even let you vote and call it democratic, wink-wink) and then pulling you over to intimidate you and take as they see fit -- or possibly worse? One of the biggest problems is when people don't see the problem.