Kader, according to Wikipedia, made a concerted effort in the past to buy up European Model Railroad Manufacturing and ship it all to China.
"As well as introducing its own brands to North America, Kader, under the Bachmann brand, built itself up as the largest volume seller of model railways by purchasing other failing companies, using the Bachmann name to front a series of purchases in the rest of the world to combat the then poor perceptions of Hong Kong based production quality."
"Kader's business model for each take over, from its original purchase of Bachmann to the present day, is to buy a perceived quality brand in the target market or country. The company then closes local in-country production facilities. Armed with state-of-the-art manufacturing machines and AutoCAD systems, Bachmann then improves quality by re-engineering the models in Hong Kong, and reduces cost by producing the models in its jointly owned plant in Dongguan, China."
Kader bought Bachmann, dates shown in article. Sol Kramer and his partner formed Sanda Kan, made models for all sorts of manufacturers.
When Sol decided to sell out Sanda Kan, JP Morgan Associates bought it, ran it into the ground, then Kader bought it. Shortly after, the letters went out to many, if I recall, that they weren't going to make their stuff any more.
Sanda Kan makes USA, AristoCraft, Kader owns Bachmann, bought the three-rail Williams line (memory tells me they owned the tooling anyway), some how they ended up with the K-Line stuff, but maybe not all...I didn't pay a lot of attention to the K-Line stuff as it doesn't have much interest to me.
There was, I have been told, another desire to purchase a big name. No, I don't remember who it was.
So, Kader holds the key to most of your large scale trains.
Since the USA and Aristo tooling is held in PRC, and following the length of time and difficulty it took for Maerklin to repatriate their owned tooling from the PRC, one wonders.....
Read the link, it might help you understand this model railroading version of Big Brother.