I honestly oppose the concept of alimony , what are your views on it?

I don't understand why alimony is given by a spouse to his or her former spouse after divorce. The reason behind alimony is to be able to incur daily expenditure. But I believe that an individual should only be himself (herself) responsible for earning livelihood and satisfying their needs. Why is the former spouse who is earning high income responsible for this?
Obviously if there are children then it should be allowed. But even then , every spouse should contribute 50 % as it is equal responsibility of both. And it should be looked upon that that money is used only for child. This can be done by making mandatory for custody holder to prepare a monthly budget or something.
I honestly oppose the concept of alimony , what are your views on it?
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