That is prohibited by Islam, regardless of how many wives you have. The man has to provide for all of his wives needs, and cannot take or use any of her own money or property to do it. So, obviously, marrying more than one is not normative in Islam, and could not be for the economic reasons noted above.

Secondly, no Muslim woman who knows her rights in Sharia need be a second wife if she is against it, because she is free to negotiate her marriage contract as she sees fit, and can insist on including a provision by which her husband must agree not to take a second wife.

That is Islamic law. If most of the Muslims do not follow it, and deny their daughters their rights, then that is another thing.

In marriage and gender relations, the actual practice of the Malaysian Muslims is closest to the ideal of Sharia.