I have, of course been through an early marriage in which I paid for all and then some even after it was over.  I have also enjoyed the company of many providers where the answer is a straight forward "yes".
I have also had many independent successful friends with benefits where the only "pay" was my finding pleasure in knowing what the friend needed to be satisfied and to provide it in return for which I was also satisfied.  
My wife is very successful financially and has no more need of my support than I have need of hers.  This has been a long lasting marriage.  
Finally, my current friend with benefits has been a deep and wonderful relationship for me for years and she has always held positions of authority and has been financially quite successful.  Again the "pay" is my finding pleasure in satisfying her her finding pleasure in satisfying me.  .