Of course they know, just like they know about dirty money from abroad propping up the economy, empty properties owned by rich foreign nationals pushing up hous

Of course they know, just like they know about dirty money from abroad propping up the economy, empty properties owned by rich foreign nationals pushing up house prices for UK residents etc. but there are several steps between that and doing something about it: 1) They have to know (they probably do) 2) They have to care 3) They have to know what to do about it 4) They have to accept the potential disadvantages of taking action 5) They have to decide it is more important than everything else they have on their plate 6) They need to actually do something about it 7) They have to succeed in the Court case, Tax investigation etc. 8) Eventually, worse-case, the wealthy criminal just dusts themselves off and finds something else to do I'm sure that's why most Politicians just talk about stuff. It's too hard to actually do things.