He is treating you as a paid cleaner.
My husband earns pretty much twice what I earn. It all goes into the same pot. It is literally never ever mentioned. Never once in any argument has he pulled the 'i earn more' or 'it's my money' card. We do equal jobs at home because we are a partnership, and what kind of partner enjoys sitting on their bum watching TV knowing that their partner who has also done a full days work, is cleaning up after them?
It's horrible that he doesnt consider you equal. That he pays the bills in proportion to earnings like most people but uses it as an excuse to order you around. He actually points out what housework needs doing like you would do to a paid cleaner. But he buys you flowers instead of acknowledging that he is an adult and has some responsibility to look after himself.
If you suddenly got a big pay rise, or inheritance, or won the lottery, and insisted on paying more towards bills than he did, do you honestly think he would let you? Would he really accept you coming in and saying darling you need to clean the floor again, you missed a bit, while you go and sit on the sofa with a cup of tea? If the answer is no, then it's not about who earns more, it's because you are a woman and because he thinks he is better than you.
He is treating you horribly and using money as an excuse.
Please please dont try for another baby with him. Especially as it sounds like you are not married. Otherwise I think it's fairly easy to see how you will be on maternity leave, he will be paying a higher proportion of the bills or all of them and according to his 'rules' this will mean he has complete control over you because looking after your new baby all day wont be 'contributing', he will boss you around to the nth degree and when you realise that you dont want your child to grow up thinking its normal to treat your wife like a slave, you wont be able to leave because you will have no job no money and he wont help at all with childcare arrangements so you will have all that to sort and won't have any kind of financial settlement because you weren't married
Sorry to sound so dramatic but have seen the exact situation on here time and time again, it starts like yours and never ends well