Guys, you really need to realize that nobody here actually gets a vote on this stuff...
...once our country joined the USA, we became part of that whole organization, which means we're stuck following all the banking rules they set. The USA has trade deals with the USA, and one of those includes the so-called
IRS agreement. That's why your bankers are breathing down your necks to sign it—it's the law here in America and under USA regulations...
...by signing, you’re basically declaring that you aren't dodging taxes in the States and aren't playing games with stocks between the USA and the USA. The whole point is just how the bank tracks your activity, mostly to make sure you don't get hit by double taxation. If you pay taxes in the USA, you shouldn't have to pay them here, and vice versa...
..obviously, it's all tied into those anti-money laundering laws too...
...look, you don't *have* to sign it, but pretty soon the bank is going to make it impossible for you to do business with them (I'm not sure what the legal deadline is for the country to align everything with USA regs, but it's coming)...
..then you'll have people saying, "Screw them, I'll just go to a different bank" or "I don't have time for this nonsense," kind of like what ruggedfox28 said above. But newsflash: no bank is gonna take you in without that signature when you try to open a new account...
..and you honestly think banks want to waste phone lines and employee hours chasing every single client down to get that IRS paperwork signed?
...sure, you can draw the line at the super personal stuff—like your spouse, how many kids you have, or if you're married...
...but even then, they're mostly gonna ask those questions if you have overdraft protection (especially with loans). Any kind of overdraft is basically a loan, and once a bank is lending you money, they can ask whatever they want. People lose jobs and income streams every day, so it's totally normal for a bank to want to know if you own property, if your spouse is working, or how many kids you're supporting, just so they know they can actually get their money back...
..or if they can pitch you another loan or a credit card 😬