I think a useful tactic to curb loss of expensive bikes would be to legally target the people who buy them, these are the people that cause the market to exist and perpetuate the situation. My guess is that most of these people are not crooks, i.e. they are just young people who want to but can't afford a nice bike and they know exactly what they are buying. I don't understand anything about bikes so can't give an ex…
The expensive bike won't rust. The expensive bike can be repaired when things break. The expensive bike is half the weight.
If you are using your bike frequently, it's better in the long run to have decent hardware.