In practice to get to a confiscation hearing, there is an investigation which means following the transaction trail and the more complex and convoluted that is made with dead ends and people who disappear (but leave a small trail of evidence they were around at some point to prove they are real), the more time and money authorities expend and the longer it goes on with me hanging onto the money (even if you seized some of it already). The fact I'm selling crap and the transactions make it look like I'm mining gold in a moron mine is enough for a good lawyer to talk me out a seizure or have some bargain made with the prosecutor (which I can always delay paying anyway if I'm in Scotland it seems : http://www.dailyrecord.co.uk/news/crime/revealed-75m-dirty-m.... I'm sure other places have similar stories.)
How legislation is supposed to work (as portrayed in TV/Film Justice) and how it actually works in real life is very different. If it worked TV Style, every 419 scamming prince would be in cuffs when he went to the Western Union office to collect his processing fees. Instead they drive around Lagos in BMWs laughing at all the mugus they scammed with lame-ass stories.