I have been in the same situation.

My experience previously with MNC (oil & gas) they never ask my salary figure and slip. They offered me a salary base on the market value of the job description. The offer is a 300% increment from my previous employment with a local SMB.

Recently I have an interview with an international company and have the same experience as you.

I just said to them (usually for a big company) every job descriptions published normally matched to job salary group/band which have a certain salary range. So I believed they already have expected values in their mind. Just table it to me, if not meet my expectation then I will negotiate. Or if they want, I can table mine then they can negotiate.

However, they insist on how much my salary and slips. I just said to HR my current salary is confidential between me and my current employer. She reply there is no such confidential thingy. In return, I ask the HR person to tell me her salary. She said it's confidential and ask me how much I want. I have got a friend inside and know how much the salary range for that vacancy. So in the beginning, I know they can meet my expectation. I also cross-check with Glassdoor how much usually this company pays and how much the market average pay for Malaysia. So I just gave how much I want which little bit higher than average. After negotiation, we didn't conclude because she wants way way below the market average. It's an insult to my 20 years of International experience plus couples of pro certificates.

For the 3rd party head hunter usually I gave them a list of position that I interested plus a range of salary that I'm targeted. So we don't waste our time.

Early morning breakfast:

Five Things Your Salary History Says About You

Never Give Up Your Salary Details -- Do This, Instead

What If 'Current Salary' Is A Mandatory Field On A Job Application?

How To Ask 'What's The Salary Range For This Job?'

What is the difficulty to provide the payslip to the HR? If no payslip how can they justify? You are not the only qualified candidate

If one is really good, why his/her payslip /last drawn salary is low? People always thought they are top performers but actually not. Those HR has seen more candidates and know much than you know

A, B,C go apply for a same position at company X.
They all self claimed “top performer”, have same experience, same qualification, all perform good at interview
Candidate A
Last drawn salary 1.8k
Asking salary: 4K

Candidate B
Last drawn salary 3k
Asking salary: 4K

Candidate C
Last drawn salary: not to share payslip
Asking salary 4K

Who will you hire?
Most HR will hire B, some will hire A but offer lower salary. But not C. How can C justify he is good? Do you know so many people out there with high qualification looking for job also?
Personally I think those people who refuse to show payslip when HR requested, have EQ problem. If you are really your new boss will fight for you. If not then mean he doesn’t know you or you are just nothing different to other average guy

Yes you can decide to give or not give, but it is also up to the employer to whom they want to hire for the job.
Anyone can talk big, ask more information doesn’t help to justify, no evidence how to justify?
Lol are you just graduated from school? Must people give you what you want?