https://bapiotrainingacademy.com/foundation-programme/
Unfortunately yes, usually wealthy IMGs secure foundation year training places through courses like the above. It appears that PLAB licensing exams are not required for the course above.
IMGs still overseas are charged £32k plus each by these academies for some courses. Not sure what proportion, if any at all, the NHS receives. Fast track courses for IMGs outside the UK into foundation and speciality training places in the NHS.
The lobby group, BAPIO's lucrative training academy have a sponsorship licence from the GMC so they can recruit easily from abroad for NHS roles and they do so without a legal requirement to recruit from the domestic workforce. BAPIO is highly influential in NHS workforce planning. Without the RLMT or similar being reinstated, I'm not sure how the issues of unemployed doctors is going to get resolved. The GMC also needs to pause PLAB exams if limited jobs are available.