Hold on a bit here; don't put tips/gratuities in same bin as taxes. In Canada, federal and provincial sales taxes (or a blended/harmonized sales tax) are added on for pretty much all goods and services sold. They are predictable and 100% transparent. In the UK, you typically have prices that include the VAT; about 100% opaque. We used to have something like that in Canada with the Federal Sales Tax but it was changed about 40 years ago in favour of the Goods and Services Tax, which was calculated and displayed separately.
Admittedly, it can get a little more complicated than one tax: hotel rooms may be advertised at $200 per night but they might be subject to sales tax and other special money grabs by other parties with the authority to do so. They'll all be clearly listed/identified and the consumer can choose whether to purchase.
As for tips and the like, they are not shown or payable on any purchase except as an approved add-on or more like a service charge for certain activities (such as 15% for large groups in a restaurant).