This is not my opinion but it is fact. Most taiwanese singers you see these days in MTV, in almost every album, there will be songs which are covers of japanese/korean/english songs. They do it so often; that it gets me intolerant, in sg tv i notice, they tend to play the 'taiwan covers' music commercials first and then the original japanese/korean version, giving the general public the idea that the original ones are actually covers instead..
My conclusion is because these people don't have ability to compose music, that's why they need to sing other ppl's songs. The sad thing, some people actually think japan/korea is try to copy taiwanese singers by singing their song (without know who's the original one), but in 99.9% cases, the original japan/korea/english ones are always the 'much' better version.
I don't think they steal the songs, more like their company borrowed the song under legal methods.